Check this page for what I am looking at
http://www.delta-transparts.com/MM007.ASP?pageno=30
Heres a pic
Thats $32 and its 5 1/2" x 11" x 3/4" stacked plate. Thats big enough for 2 120mm fans.
What is the consensous on stacked-plate type radiators? They look pretty good and the price is awesome. Though I bet its also Al.