http://www.shipshapecanvas.com/ located in Duluth MN, they made my cover 3yrs ago, very nice and well made. It does require the mast and boom for support, I'm not sure if they make one for a framed system any more. His goal is to make the cover as simple and efficiently as possible. I only need one support under the boom and the spinnaker pole supports the front. 2 hours to install versus 2 days with wood frames and tarps I used before. Life lines stay on. No problems with all the snow we had last year. Barry