I'm in the exactly same dilemma. Got a new NX5 and trying to see if I can replace the old 106" Silver Ticket or just buy a new, bigger, better, more expensive Stewart or Screen Innovations.
One one hand, replacing the materials is the cheapest solution since the frame is pretty solid. I just don't want to find glue and hack the materials together. The other choice is to put down 1-2K for a new screen.