Some items from this specific schematic: Pump-assy-oil, Screw-pan-cros, Tube,3x6x40, Tube,4.5x9x380.
The most expensive part in this assembly is the Pump-assy-oil.
The most reasonably priced component used on the Kmx125-b5 1990 United Kingdom Fr Sd Oil Pump is the Screw-pan-cros.