Originally Posted by jpthequilter
I know what you mean. I think you might have to make your own, cutting a slit out of pieces that are the same size as the frame is made of, and rounding the corners. It should spread enough to fit and clamp tight.
You need slightly larger pipes for them to clamp over and not break from the thickness of the quilt sandwich. Mine fit tight, even with a thick batting. See above reply for my measures.