Well, the dimensions I'm looking for are a bit unusual... I am thinking of taking my two 12g nano tanks and combining them into one larger tank in the 40-70 gallon range. One of my two tanks is a 12 long (36"x8"x9"), and I love the look, but have become frustrated with the tiny amount of working space.
The easy way out would be to go to a 33L or 40L, which might be what I end up with due to cost. But I'd like the tank to be wider than 12 inches (and still be at least 48" long), so I'm investigating things more like this:
48x18x12 (45g)
48x24x12 (60g)
72x18x12 (67g)
Shipping and customs from Miracles on any of those would probably be prohibitive. But I'll get a quote from them anyway (I've heard great things about Miracles).