I've never done it, but I remember seeing ads on tv for repairing leather and vinyl chairs, etc. they gooped something on, and then used something to press in a leather texture. Is that what you're missing? I googled leather and vinyl repair and didn't see anything. I wonder if Tandy's or Michael's might have something. Another thought would be to make your own texture. Using something like a clay that hardens, press it into the texture you want, let it harden, cure, or whatever, and then use this to make your texture. Good luck!
I remember that! It was one of those cheezy ronko-type commercials.