The component with the lowest price in the OIL PAN/OIL PUMP schematic is the Washer,plug Drain 14.
Some items from this specific schematic: Dowel,pin,8x14, Bolt,flange,nshf,, Bolt,plug Drain 14mm, Washer,spg.24mm ..
Check out any of the twenty-six Oil Pan/oil Pump components enlisted.