You should try to build it yourself.
Or buy a standard 55g tank and cut the baffles so the chambers will be the way you want them. I think there are kits available on e-bay where they sell the baffles to fit a standard 55 gallon tank.

checkout
http://www.melevsreef.com/allmysumps.html

Mark has a bunch of "blue prints" on his site for different styles sump/fuge setups.