I use the rubberized Talon Grip on my EDC G26. Since I carry IWB, I picked rubber over sandpaper.
Go to their website to buy 'em. No shipping charges, as they come in a regular envelope with the same postage as a letter.
There are several YouTube videos of the simple installation process. The best "tip" is to tuck the two strips that wrap around the front under the left side of the grip. You can see the "tuck" if you look closely at the attached photo.
Sorry, the photo is not perfect. I just pulled out the gun and snapped it with my laptop.