I've seen on HGTV a long time ago, where hoops were made of smaller rebar, bent, and then covered with an old hose to keep from cutting the plastic. I have never tried it, but they even made a green house out of that. There was a company that sold clips to hold the plastic to the hoops too. You might try an internet search to see what you can find. So now you have more ideas then you can use, lol, but it's easier to tame a wild horse then add life to a dead on, as they say,