Parts such as the Oil Pump - Fuel Pump: Gasket(8.2x14x1).6 (nas), Screw, Spring, Cap,oil Filter are included in the Lt230e Quad Runner 1987 (h) Usa (e03) Quadrunner Quad-runner Oil Pump - Fuel Pump parts fiche.
The Spring is the cheapest item from this partsfiche.
Of all the components used in this assembly the Cap,oil Strainer is the most expensive.