as far as finding one:
I don't know if you are meaning for your MTX or ATX, but:
You can go new: and get one off the SVT engine, or escape engine. through the normal sources: bill, dealer, etc..
or you can go used at a junkyard, etc...
As far as R&D to make it work, don't ask me.. I wish I could help you!!
I am thinking about finding a totalled Escape and ripping the Tranny cooler off.. I wonder if there's enough room to mount it on an E1? (Guys? anyone know?)
Ray