I believe Burris has these new pistons in .005″ increments now. You don’t have to go very far to get a new +.005″ piston to fit.
Might be a better idea for the wear factor to use a billet rod with a bearing insert. ARC has these in stock.
If you can at least change the oil at every fuel tank fill up, that engine should have another 5 years left in it.