The local dealers on screen catalog search looked the same as my catalog at home. Both don't go back far enough to show the piston/seals that I have that Vetech63 called Bonded. Somehow the guy at the dealer came up with what I think is a upgrade (my word) part number S220090 and ph number to call.
The parts guy there had older books and came around to the original (bonded) piston and seal were no longer available. Looking up the upgrade showed $170ish for the piston and $130ish for the seal kit. That's getting close to lower end of rebuilt cylinder territory to me.
Looked around the net and saw mostly the same $ he quoted. So I decided to reuse my piston and seals cause they weren't my main issue which was my gland seals that were leaking. I just used the new seals out of the gland kits I had ordered. Found out the 2 extra seals in those gland kits are for what I think are the newer design glands where the seals are inside the threads, whereas mine the seals have to cross over the threads to get to there seats. A cutting risk, so I taped over them to install, and put both cylinders back together.