I bought one from "Easylife" to go over the back door. It is perpex and I am really pleased with it, and it was about £50. My OH fitted it, but it was not difficult. It entailed measuring up and drilling four holes in the brickwork, then slotting the perpex in the frame(which was the hardest part needs two pair of hands). I would not think it would be too dear to pay someone to fit it. Go for it !!!