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You can find them at a lot of pet shops as well as online -- whether it is the glass AND light fixture or just one or the other they are frequently sold apart from "kits" and tanks They really aren't that expensive, especially for the 10 gallon size....if you are into EBay you might look over there as I find a lot of *used* items at drastically lower prices than new and the ones I have purchased/seen have all been in good shape.
I have one, its got a screw in type lighting. I don't know if it would be cost efective to ship it to oyu though. You would probably be able to find it cheaper at walmart or something.