Check out any of the eleven Gasket Kit A components enlisted.
The O-ring,7.7x2.5 is the lowest priced item on this Gasket Kit A schematic.
A sample from the products for the Gasket Kit A include: Parking,tappet Co (nas), Gskt,cyln.stud (nas), Seal,valve Stem, Gasket.cylinhead (mca).