Here are some pictures and measurements. This gun is heavy steel, about 2 pounds 1 ounce unloaded. I could conceivably use a couple small shims or bits of rubber or do some very minor metal shaving if something was close.
Gun Length 8"
Gun Height 5" plus sights
Grip Height 3 7/8"
Grip Base 1 3/4"
Grip Width by Trigger 2 3/4" (back of trigger ring to back of grip)
Screw is 2 3/16" down from top and 1 11/16" up from bottom - one screw on each side of grip
Square Butt
Butt measurements without grip:
3 5/16" from top to bottom
1 9/16" or slightly less across bottom
2 1/4" from back of trigger grip to back of handle
1 1/2" across diagonal crossbar
3/8" deep
5/8" deep if you include the screw holes
The grip that comes with it fits very snug and is (for my taste anyway) a good rubber grip. I have somewhat large hands and all the fingers from one hand fit on it fine; it would be nice to have a little more room for my palm on a two handed grip though.
Thanks again for any help folks can provide. I'm wondering what existing laser grips might fit this.