Engine mounting spacers
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
These are the aluminum spacers that fit on either side of the engine and through which the 12 mm engine mounting bolt is fitted.
Both the left and right side spacers are 22 mm long, have an inside diameter of 12.2 mm, and an outside diameter of 24.9 mm.
If you need to craft replacements, McMaster-Carr part number 4634T23 will work well for rod stock you can cut to length and drill.