The Washer,plain,5mm is the cheapest item from this partsfiche.
Parts such as the Cooling Fan / Shroud: Bolt,hex.,10x45, Washer,screw,4x18, Motor Assy.,fan, Rubber, Shroud are included in the Gl1100 Goldwing Aspencade 1983 (d) Usa Cooling Fan / Shroud parts fiche.
In this schematic the "Rubber, Shroud" is used most often.