jegs or summit should have a suitable cooler, if nowhere else. Preferably get one with thermostatic control of some sort so you don't OVERcool the fluid.

 

Good point, you want it to cool to what the operating temp should be, obviously never hotter but never cooler as well.

 

And if you dont have a place to mount it with good airflow (due to IC taking up all the room or whatever) get one with a fan on it to cool.

I buy all my stuff through summit mostly but jegs will have it as well. Even eBay has a lot of the same parts on it.