I thought I would bump this back up with all the heat exchanger talk going on. The photos above are the one I had them build for my old car. They will build one any size, single dual or triple pass, add or delete a cap, place the inlet/outlet anywhere you want and any size you want and even give you a choice on what size pipe you can have in it.

they had mine ready in under a week for $275 shipped if i recall correctly.