Briguy,
I have a sump that came with my tank, I used it for a week or so. It looks like this one but drilled for an external pump.

http://www.theaquariumonline.com/detail.aspx?ID=559

There is a crack where the hole was drilled, it did not leak for me,when I had it running. Looking just to get a couple of zoa frags. Rough dia are 27L X 16H X 12W. Let me know if you are interested and I can get a few pics for you or meet you as we live close by.

Also have a 30 gallon long not drilled or 30 gallon tall that has a hole already drilled.(on the upper right hand of the back glass)
(man now i know why my wife keeps on asking what i am going to do with all of those tanks in the garage )