Two choices
http://www.jehmco.com/PRODUCTS_/HARD...der_boxes.html
Almost 1/2 way down the page:
I really like the *picture window* one. It will give the most water flow thru
Below that is the large breeder trap 12"x4"x4". Although it's about 1/3 more cubic inches, 2 would fill the front of your tank with only inches between the two.
If I was a fish I would like the picture window style better I think.
It's a bit of a pain to order from them but I challenge you to NOT find more stuff you NEED and it will make the shipping cost and bother of ordering well worth it.
violet