You MAY be able to fit a pair of newer XR3-Reds from recent year Blackhawks or Single Sixes. These are the much unloved--except by a few (one may be you!) checkered "hard rubbers" (black plastics). These are similar to those used on the midframe New Vaqueros and Flattops NXR3s since 2005, but in the XR3-Red pattern. Some (myself included) have found they *basically* fit but leave the gripframe slightly metal proud. YMMV. If you find they basically work for you but feel they're a bit aggressive, the harshness of the checkering can be lessened with a good working over by 00 or 000 wool, knocking the sharp points down. That and/or some shooting gloves helps.
Other routes: carefully slim down (from the backside) what you have. I've found this only works for subtle slimming and not really for significant reduction, but I'm talking DIY from someone not that skilled; a gripmaker could do better. "Gunfighter" style grips from the likes of Eagle and others are the slimmest available. These are very slim in the palm area but typically with a swell near the top or web area of your hand--to reduce excessive roll-up under recoil I've read. Like anything else (see above factory black plastics) folks either love these or don't. Very few in-betweeners.
Last but not least, there are a number of fine custom grip makers here on RF and elsewhere that may be able to accommodate you with a gunfighter type, or at least slimmer-than-stock (older) XR3-Reds.
Hope this helps.
I'm one of those that actually like the controversial checkered blacks (after my toning-down exercise, above, which also takes the plasticky sheen down as well) and swap them back on--from several very nice custom wood sets by Carl "Private" Schultz--when banging around backwoods. I find the newer stock Rugers to be reminiscent of the Colt "hard rubbers." And, I agree, they do look nice on stainless especially. A "clean," no-nonsense working gun look. My main complaint is they're (especially in the narrow backstrapped XR3 guns) a bit slim and lacking in "shape"--the Colt "bell" profile I Iike--even for my smallish paws. Some good, no-slop Shooting gloves would help in that department as well I would think.
