I have a set of Original Mustang J frame RB grips for sale. Grip screw is included. I bought these used and never put them on a gun. I tried them today on my 642 and they fit well, but the left grip is a bit proud at the recoil shoulder. I don't know what kind of wood they're made from. I'll post a couple of pictures and have more I can text if you need it.
Price is $65.00 shipped. I can take cash, check, postal money order and PPFF.