Did you find it didnt quite fit tho? I have the same one and its about an inch short at the front.Look for Aqueon Versa-Top lids.
They make hinged glass lids for tanks of all sizes.
I bought one for an Aqueon 10g tank from Petco.
I like it a lot. The plastic hinge part still works well. They also come with a plastic trim piece that has a channel in it for the rear glass to slide into. It can be trimmed to fit so your filter, heater cord, air line, etc etc, can be run into the tank.
I would buy another versa-top on the future if I needed a lid for new tank build.