While you won't know until you check with a Ford parts department, historically it has proven difficult to get Service pistons for engines not currently in production. Plus this would also mean that you would have to use Ford parts with the attendant price. Aftermarket pistons will only be available in standard and standardized oversizes like .020, .030, etc.
So if you want to try and use your existing pistons, or the Service oversizes prove to be unavailable or prohibitively expensive, the real question is what's the actual piston to bore clearance, and what's the acceptable clearance? Answering those questions will tell you if you need to go to the next economical oversize.