PlanetCatfish.com

I'm on the hunt for a small tall tank, with a footprint of 12"x6" and a height of about 10 or more inches. Would probably turn out to be about 2 US gallons.

Id suggest that you make a tank that size yourself as you are unlikely to find one that size. Its not terribly difficult and at this size the glass would be easy to obtain and work with. Have a look online as there are couple different ways to put a tank together.
Good luck, fun project!

Thanks characinkid, I'm really trying to avoid doing that. Just don't have a lot of spare time. But I may just end up doing that anyway.