Some items from this specific schematic: Collar,6.8x10x60, Oil Seal,fuel Tank Ca, Damper,rubber, Tank-comp-fuel,p.b.or.
The lowest price component in this Fuel Tank parts-list fiche is the Bolt,socket,6x14.
The Fuel Tank is made up of components including this Tank-comp-fuel,l.gree which is the most expensive.