Check out any of the twenty Oil Pump components enlisted.
Parts such as the Oil Pump: Screw, Cap,oil Filter, O Ring(d:1.9,id:13), Plug(14x12) are included in the Dr200se 2013 (l3) Usa (e03) Oil Pump parts fiche.
The Oil Pump assembly is constructed from several parts from which the Pump Assy,engine Oil is the most expensive.