Since the Hi Power hangs well without a frame, you could order one that has material the exact width of the room; remove the spring retracting assembly and hang the screen attached to an aluminum square tube the width of the room. Granted you probably lose any warranty,but you would gain about 4-6" in screen width. These screens are so forgiving, you do not need to stretch them, just hang them. The bottom draw-down weight tube would also have to be cut to size if necessary. You could then attach some velcro to the tube and wall to keep the bottom stable and tight to the wall.
Just a thought. Bob