Of all the components used in this assembly the Pump Assy,oil is the most expensive.
Parts such as the Oil Pump - Fuel Pump: Strainer,engine Oil, O Ring(d:2.4,id:60.5), Nut, Screw are included in the Lt-f160 Quad Runner 2000 (y) Usa (e03) Quadrunner Quad-runner Oil Pump - Fuel Pump parts fiche.
The most reasonably priced component used on the Lt-f160 Quad Runner 2000 (y) Usa (e03) Quadrunner Quad-runner Oil Pump - Fuel Pump is the Spring.