Try
www.bulkparts.com or
www.delta-transparts.com they have a wide selection of the Hayden transmission coolers.
However...back to my original post...can someone give me some predictions, or straight facts, as to how this would compare to a dangerden cube? or aquastealth cube? I'll be using the 1250 Eheim, which is rated at just over 310 gph.
Thanks