The lowest price component in this Transmission parts-list fiche is the 'o' Ring 18mm.
A sample from the products for the Transmission include: Gear,output 4th,24t, Circlip-type-c,16mm, Gear,input 2nd&3rd,17, Washer,claw,8x22x1.2.
Check out any of the twenty-four Transmission components enlisted.