Check out the Decal grip they offer for GLOCKS. I use it on my Model 27 for CC and I also use it on my duty weapon Model 22. They come custom cut - all you have to do is clean the grip w/ some denatured alchy and peel and stick. They come in sand paper and a rubber compound texture. I use the rubber and it does not chew up my uniform or civies.
Do a search for Decal Grip and they should pop up.
Halfacop