Find your internal IC parts first. A small motorcycle radiator or something similar. You need to make sure it'* not too restrictive. Actual flow area needs to be equal to or greater than the stock SC outlet/lower intake opening. This will almost certainly mean you'll have to modify the lower intake opening. It'll also be tough to find something (heat exhchanger) thin enough to work without making the IC too thick. Your fuel rail will also need to be extended, and you'll need a new SC belt.
Some method of pumping the water (12V fluid pump), and another heat exhchanger for the front of the car.
Or you could do a half-assed IC like I have in mind that would only be half as effective, but less than 1/4 the price