Not sure what the Desantis uses, but Top Grip could be a good option..
http://www.champchoice.com/prod-20__...AIRS-1031.aspx
or this stuff..
http://www.champchoice.com/prod-REPL...NRA_-1082.aspx
The patches are rough, like an abrasive grit that's been laminated and bound to a flexible backing.