Parts such as the Fuel Tank: Spacer(8.5x12x19), Cap Set,fuel Tank, Washer (8.5x29x1.6), Cushion are included in the Sp100 1983 (d) Usa (e03) Fuel Tank parts fiche.
The twelve Sp100 1983 (d) Usa (e03) Fuel Tank component parts are all listed in this schematic.
The component with the lowest price in the FUEL TANK schematic is the Washer (8.5x29x1.6).