DerbyDad03 wrote:

I just saw these in the latest Rockler catalog. I'm not sure I like the idea of a "round peg in
square hole", so to speak, but they look like they would stay on.

http://www.rockler.com/clamp-pads-fo...-piston-clamps

If you have a HF near by, might be worth a look.

https://www.harborfreight.com/9-pair...ads-91952.html