there are slight changes in the grips of the early guns ,late 50's, early ,mid 60's and the later ones, also from the Super Bearcat...BUT we seem to think the Super Bearcats and the New Bearcats are pretty close, and have worked for us.
you will see on the 'newer' ones, the curve (rounded) top edge is what does not align, and with a bit of work (fitting) they can be usuable...just take your time, neatness counts..............
Well I don't know if you can see these but I got them for $16.30 shipped and hope I can make them fit. http://www.ebay.com/itm/Rugged-Products-Ruger-Bearcat-Black-Pearl-Grips-/261388631514?autorefresh=true&_trksid=p2047675.l2557&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=y4jca6pcDHwG2zsQ63ozX%252BO%252BG2M%253D&orig_cvip=true&rt=nc#ht_69wt_1292