D311 cylinder parts help

I have a 212 grader SN 9T2490 with D311 in need of pistons, rings, sleeves and top and bottom rubber and copper seals. I see a foot note about 5H7269 piston and liner replacement group, not clear if rings are part of this kit. I don't need new rods just bearing and I don't see any individual PN's
Rings show in sets for 2 pistons 5F331 so would need 2 sets of 5F331? Any input and source recommendations would be helpful.

Start with a call to Florin Tractor.

What's wrong with you Pistons? Did you measure them and the bores? You might want to price those parts, if you can even find some before making the decision that they need to be replaced. A good hone, bead blast Pistons and knew rings goes a long way.