Turn signal replacements / replicas - Police Dietz turn signals
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Barjan
No longer available
Barjan appears to no longer manufacture any signal lights. I will leave this information here for reference.
I saw these at a truck stop near the 2007 Virginia Rally when Roger led a group of us on a great ride. Thanks to Tom Halchuk (also on the ride) for confirming the manufacturer when I returned to Odessa, Florida (our home at the time).
Barjan has chrome-plated zinc die-case 4 inch diameter turn signals.
- Order 049-3436110 (single contact) or 049-3436210 (double contact) for the red and amber lenses.
- Order 049-6437112 (double contact) for the single-sided red lens.
Grote Industries
Grote Industries has chromed-plated zinc die-cast 4 inch diameter turn signals.
Grote standard zinc die-cast signal lights
Grote 53000 double-sided signal light
Double-sided lens: red and amber
Chome body
Double contact: 1157 bulb

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 53020 double-sided signal light
Double-sided lens: red and amber
Black body
Double contact: 1157 bulb

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 53023 double-sided signal light
Double-sided lens: amber and amber
Black body
Double contact: 1157 bulb

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 56020 double-sided signal light
Double-sided lens: red and amber
Black body
Single contact: 1156 bulb

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 56000 double-sided signal light
No longer available
The Grote 56000 is obsolete. I will leave this information here for reference.
Double-sided lens: red and amber
Chrome body
Single contact: 1156 bulb
Old URL (no longer active): http://www.grote.com/product.php?product_number=56000

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 56032 single-sided signal light
No longer available
The Grote 56032 is obsolete. I will leave this information here for reference.
Single-sided lens: red
Chrome body
Single contact: 1156 bulb
Old URL (no longer active): http://www.grote.com/product.php?product_number=56032
Grote 53032 single-sided signal light
No longer available
The Grote 53032 is obsolete. I will leave this information here for reference.
Single-sided lens: red
Chrome body
Double contact: 1157 bulb
Old URL (no longer active): http://www.grote.com/product.php?product_number=53032

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 53052 single-sided signal light
Single-sided lens: red
Black body
Double contact: 1157 bulb
URL: https://www.grote.com/signal-lighting/stop-tail-turn-lights/4-die-cast-single-face-lights/53052/

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote thin-line zinc die-cast signal lights
Grote 55290 double-sided signal light
No longer available
The Grote 55290 is obsolete. I will leave this information here for reference.
Double-sided lens: red and amber
Single contact: 1156 bulb
Old URL (no longer active): http://www.grote.com/product.php?product_number=55290

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Grote 50652 single-sided signal light
No longer available
The Grote 50652 is obsolete. I will leave this information here for reference.
Single-sided lens: red
Double contact: 1157 bulb
Old URL (no longer active): http://www.grote.com/product.php?product_number=50652

Photo courtesy of Grote Industries.

Photo courtesy of Grote Industries.
Peterson Manufacturing Company
Peterson Manufacturing Company has a limited selection of chrome-plated zinc die-cast 4 inch diameter turn signals.
Peterson Manufacturing Company V338C-2 double-sided signal light
Double-sided lens: red and amber
Bulb: Integrated LED

Photo courtesy of Peterson Manufacturing Company Industries.

Photo courtesy of Peterson Manufacturing Company Industries.
Peterson Manufacturing Company V339A single-sided signal light
Single-sided lens: amber
Bulb: Integrated LED

Photo courtesy of Peterson Manufacturing Company Industries.

Photo courtesy of Peterson Manufacturing Company Industries.
Peterson Manufacturing Company 338-2 double-sided signal light
Double-sided lens: red and amber
Bulb: Integrated LED
URL: https://petersonlightsandharness.com/product/double-face-round-park-turn-light-amber-red-poly-bag/

Photo courtesy of Peterson Manufacturing Company Industries.

Photo courtesy of Peterson Manufacturing Company Industries.
Peterson Manufacturing Company 337 double-sided signal light
No longer available
The Peterson Manufacturing Company 337 is obsolete. I will leave this information here for reference.
Double-sided lens: red and amber
Single contact: 1156 bulb
Old URL (no longer active): http://www.pmlights.com/products.cfm?cId=2&fId=3&pId=389

Photo courtesy of Peterson Manufacturing Company Industries.
Peterson Manufacturing Company 337-2 double-sided signal light
No longer available
The Peterson Manufacturing Company 337-2 is obsolete. I will leave this information here for reference.
Double-sided lens: red and amber
Double contact: 1157 bulb
Old URL (no longer active): http://www.pmlights.com/products.cfm?cId=2&fId=3&pId=397

Photo courtesy of Peterson Manufacturing Company Industries.

Photo courtesy of Peterson Manufacturing Company Industries.
Truck-Lite / Signal-Stat Lighting Products
I extracted some of this information from John Chicoine off of the old Topica Loopframe_Guzzi news group (which has now moved to Groups.io).
Signal-Stat Lighting Products has chrome-plated zinc die-cast 4 inch diameter turn signals.
Truck-Lite is the manufacturer of Signal-Stat Lighting Products. Any NAPA auto parts store is a distributor for Signal-Stat Lighting Products. If they don't have the one you need on the shelf, they ought to be able to order it for you. If you don't have a NAPA close by, call the Truck-Lite customer service department and give the rep your zip code - they'll find the closest one for you; (800) 562-5012 or (716) 661-1162.
As for price, the last time I checked () you could expect to pay just under USD $35.00 per turn signal.
Truck-Lite Signal-Stat 2751 single-sided signal light
Single-sided lens: red
Bulb: Integrated LED
URL: https://www.truck-lite.com/2751-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.
Truck-Lite Signal-Stat 2751A single-sided signal light
Single-sided lens: amber
Bulb: Integrated LED
URL: https://www.truck-lite.com/2751a-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.
Truck-Lite Signal-Stat 3802 double-sided signal light
Double-sided lens: red and amber
Bulb: Incandescent
URL: https://www.truck-lite.com/3802-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.
Truck-Lite Signal-Stat 2750 double-sided signal light
Double-sided lens: red and amber
Bulb: Integrated LED
URL: https://www.truck-lite.com/2750-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.
Truck-Lite Signal-Stat 3806 double-sided signal light
Double-sided lens: red and amber
Bulb: Incandescent
URL: https://www.truck-lite.com/3806-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.
Truck-Lite Signal-Stat 3812 double-sided signal light
Double-sided lens: red and amber
Bulb: Incandescent
URL: https://www.truck-lite.com/3812-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.
Truck-Lite Signal-Stat 3861 double-sided signal light
Double-sided lens: red and amber
Bulb: Incandescent
URL: https://www.truck-lite.com/3861-1.html

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.

Photo courtesy of Truck-Lite.