Contact @cgrautomotive for a decat Most common fmic is the Airtec Stage 1. They rarely come up second hand to be honest.
I was talking to Andy at Engine Dynamics this week and he said the bigger intercoolers aren't really worthwhile. Suggested the regular Airtec one should be up to the job for most people's needs.
@Friggerpants like @massivewangers said the bigger intercoolers like the pro alloy and the stage 2, they block the radiator or something (can't remember exactly what it blocks). Whereas the smaller coolers, like the stage 1, Wagner and Forge don't. However, the Wagner and Forge ones are a lot more expensive. So the stage 1 should be efficient for most people.