Check out any of the twenty-nine Crankshaft - Piston components enlisted.
Some items from this specific schematic: Clip, Piston Pin, Piston Ring Set (0.25mm O/s), Oil Seal (688), Brg,cyl-cal Roller (688).
The lowest price component in this Crankshaft - Piston parts-list fiche is the Bolt, With Washer(61a).