The thirteen Cr250r Elsinore 1981 (b) Usa Rear Fender '81 component parts are all listed in this schematic.
The Nut,flange,8mm is the cheapest item from this partsfiche.
Some items from this specific schematic: Fender,rr, Nut,flange,8mm, Label,warn.*nh-1*, Bolt,flange,8x16.