Parts such as the Oil Cooler: Union, Washer (6.5x18x1.6), Hose,engine Oil,left, Lock Washer are included in the Gs750es 1983 (d) Usa (e03) Oil Cooler parts fiche.
The lowest price component in this Oil Cooler parts-list fiche is the Bolt.
The seventeen Gs750es 1983 (d) Usa (e03) Oil Cooler component parts are all listed in this schematic.