What are you going to make these 10' hoops from? I assume steel of some sort, or aluminum. Call around and ask some of the local steel suppliers if they have the capability to do that. Quite a few of them won't, most are just suppliers. I do know that PDM steel in Payson can do a lot of work. I work for a plate steel shop, and we use things like that fairly often. Most of the time we have places in California do all our rolling because the beams/etc. are too big for most local places. If the local suppliers can't do it, they would definitely know of a place that can.