The most reasonably priced component used on the Gs1100g 1983 (d) General Export (e01) Footrest (model D) is the Pin 20x20.
Parts such as the Footrest (model D): Rubber,rr Footrest, Pin 20x20, Bush, Spring are included in the Gs1100g 1983 (d) General Export (e01) Footrest (model D) parts fiche.
On this parts fiche the Washer(10.5x20x3.2) is the most specified component.