The Rear Fender assembly is constructed from several parts from which the Fender,rear is the most expensive.
Some items from this specific schematic: Bolt,flange,sh,6x14, Nut,special,6x7, Washer,6.5x5.5, Fender,rear.
The lowest price component in this Rear Fender parts-list fiche is the Bolt-washer,6x16.