Originally Posted by PR_Phil

then go with the home made alternative, which is easy and cheap.

Use any regular F-clamp, open it just wider than you need it to be, then attach a strong rubber band, or surgical tubing across the mouth of the jaws. Push the F-clamp all the way on so the band/tubing is tight, then tighten the clamp.

it's a home made version of the "bandy" clamps that Rockler sells, which only go up to 3"

Phil