Well, Honeywell Garrett (formerly Garrett Turbo, Turbo by Garrett, Garrett by Honeywell, Allied Signal, Air Research, etc) just released a drop-in intercooler upgrade:
http://www.motoiq.com/MagazineArticles/ID/4504/Tested-Honeywell-Garrett-Upgraded-Intercooler-for-the-EcoBoost-Mustang.aspx...