Simon (fst4dr) was working on getting the old style air to air intercooler fit up to his car. I beleive he had a problem with gluing some of the tubing onto the intercooler and it not holding up to the air pressure. In theory you can mount about any type of intercooler you want and air to air would probably be your cheapest with the amount of old cores to be had on ebay fairly cheap. This setup will be similar to what vortech offers for the mustang crowd at a cost of $1500.
Rick