So i've just got my hands on a 12'x12'x30' old fishtank. I would love to do a vertical vivarium with this. ive removed the frame, and now i want to get two pieces glass cut for the front, one for the lip, and one for the single door. One problem though, i have no idea how to attach the door. All the glass door hinges i've found either need drilling in to another surface or (for glass to glass) leave a large gap between the two pains. Ive seen some lovely home made vivaria online that use a pivot hinges (like the exoterras) but i cannot seem to find those parts. Any ideas for how to cleanly attach a single glass door?

Thanks in advance!