Parts such as the Oil Cooler: Gasket(16x22x2) (nas), Washer(8.5x23x1.2), Cooler Assembly,oil, Bolt are included in the Gsx600f Katana 1993 (p) Usa (e03) Oil Cooler parts fiche.
This schematic depicts all components used in the Gsx600f Katana 1993 (p) Usa (e03) Oil Cooler partslist.
The most reasonably priced component used on the Gsx600f Katana 1993 (p) Usa (e03) Oil Cooler is the Washer(8.5x23x1.2).