I made my own. Fairly ugly, but very useful. I had some old netting in my stash, so I rolled it into a "log" shape, and inserted it into a sleeve that I had sewn. (Take two pieces of heavy fabric about 6" long, 4" wide, sew around all edges except one.) After you put the netting into the sleeve/log, sew the end together. I sewed it on my machine, and it did make a little "ledge." It is easier to move from one place to another with the little edge. Free/practical.