The most reasonably priced component used on the Gs1100s 1983 (d) Usa (e03) Turn Signal Lamp is the Screw.
The Turn Signal Lamp assembly is constructed from several parts from which the Unit,turn Signal Control is the most expensive.
Parts such as the Turn Signal Lamp: Bracket,rr Turnsignal Lamp,l, Nut, Bulb(12v23w,stanley,a4577a), Cushion are included in the Gs1100s 1983 (d) Usa (e03) Turn Signal Lamp parts fiche.