I know around here you can go to Lowes and buy a piece of glass and they will cut it to size for you. No bigger then your tank is and you don't need a supper thick piece of glass it would probably be cheaper to do that then to buy the cutter for the one you have. I bought a glass hood from Dr.Fosters and Smith for my 120 g and it was only about $50.00-$55.00 bucks. It might be worth the money to check them out. They are already hinged, a few years ago I tried to find material to make a hinge for the glass like they use and never found anything.