The Washer,plain, 6mm is the cheapest item from this partsfiche.
Parts such as the Frame Body: Rubber,pilli Step, Nut,u,flange,10mm, Pin,cotter 1.6x15, Nut, Flange, 8mm are included in the Sh50 Scoopy 2000 (y) Spain Kph Frame Body parts fiche.
In this schematic the "Nut, Flange, 8mm" is used most often.