Greetings, ofitg, and welcome aboard.
Thanks for your input. I completely mis-read suzukibruce's OP, I thought he was thinking of making a wax model for some grips he was going to carve. He was thinking of duplicating/modifying some existing grips. Intellectual property issues aside, I know there's a lot of hobby casting going on these days. I'm not part of it, yet. Casting would let you have elaborate matching grips on several guns.