Parts such as the Headlamp: Cover,socket, Headlamp Assembly, Cushion, Nut are included in the Gs1100gl 1982 (z) Usa (e03) Headlamp parts fiche.
This schematic depicts all components used in the Gs1100gl 1982 (z) Usa (e03) Headlamp partslist.
The lowest price component in this Headlamp parts-list fiche is the Screw.