Couple years ago I found a source with 30 grip panels (rubber vs. sandpaper style) for about $12 as I recall...
This was after buying and applying a couple Talons. Which are great, IMHO.
Have cut my own patterns on 5 or 6 different applications (including a Sub2000) and still have about dozens sheets left. That old X-Acto really comes in handy, sometimes!