Paul, I hate to be a wet blanket, here, but there are gun grips like that available commercially for pretty reasonable prices. Â*If you were making a few custom grips for individuals, it would make sense to do them yourself, but a hundred pair, seems to be way out of the 'custom' category.
You might try Â* Â*
www.brownells.com Â*
Â*for a source. Â*They are one of hundreds of shooting supply and gun smithing supply sources. Â*No need to re-invent the wheel
Al