I have one I am not using any more. I forget the brand but it is 24 inches long, helped out quite a bit before i changed tanks to a sumped system.
It needs cleaning and i was planning on fixing the center brace<just needs a dab of weld on which i don't have yet.> although i used it for months without the center brace doing anything, the flex in the acrylic is scary with out.
if your interested ill dig up some more info/pics after work.
<edit>
saline solutions
looks kind of like this
http://www.salinesolutions.net/refugium.html#pic_846