Parts such as the Rear Fender: Rubber,taillmount, Bkt,number Plate, Washer,plain, 6mm, Bumper,rr. are included in the Cx500 1980 (a) Germany / Full Power Rear Fender parts fiche.
With three applications this Rubber,taillmount is the most specified part.
The component with the lowest price in the REAR FENDER schematic is the Washer,plain, 6mm.