Even though NOS grips can be found for great prices, and most of us here are very talented in doing most anything, I also would suggest asking TercGen to please make/sell you one of his.
I’ve come “close,” two times in successfully completing the mod for a CS9 I have. The result was two ruined grips that now no one can use for anything.
Recently I acquired a CS that actually came with a TercGen grip. I can attest, (not that it’s needed,) fit, function AND cosmetics are perfect. They really are works of art through function.
Jim