Well, since Pedersoli owns the production rights and seems to have little or no interest in resuming production of neither guns nor parts, you will probably have to watch the auction sites and pay the piper's price if something you want pops up for sale.
Are you sure it's stainless, and not the "Old West" aged finish version? I do not recall seeing a SS R&S, though Euroarms did produce the aged finish version for a number of years (which, IMHO, is better looking than the blued models!)
Anyway, we'd love to see pix of yours!