Oh hell! Wait. Wrong again---duh. The exotics have a smaller screw. The hinge thingy Hogue supplies with their exotic grips fits this screw, so you'll have to swap out both. Don't know whay Hogue and Ruger couldn't get together to standardize the grip screws.
Anyway, if you get a Hogue exotic wood grip, you'll get all you need. An easy swap.