The twenty-one Gl1100i 1980 (a) Canada F-15 Rear Brake Caliper component parts are all listed in this schematic.
Some items from this specific schematic: Screw-washer,5x12, Bleed Screw, Caliper,l., Retainer,rr Bkt.
The most reasonably priced component used on the Gl1100i 1980 (a) Canada F-15 Rear Brake Caliper is the Screw-washer,5x12.