The most reasonably priced component used on the Cx500 1978 Usa Rear Fender I is the Washer,plain, 6mm.
A sample from the products for the Rear Fender I include: Stay,rr.cowl, Bolt,flange,8x16, Cowl,rr.*r-8c-s*, Washer,plain, 6mm.
This REAR FENDER I assembly utilises three Rubber,taillmount(s) - the highest specified component.