They carry the 4X shirt in a couple of styles. They also do custom shirts.
They used to have some shirts with art work by Etienne Carignan. I got a few of them when they had tem listed on eBay, but I haven't seen them listed in a long time and I can't find them on the MaddMax site. There is an Etienne Carignan site, and you can look at the art work I am writing about. One is with the '07 and '67 Shelby in white w/blue and the other one has like a collage of shots of the '07. You can get this one in different color combos. You might want to email MaddMax to see if they still can make them for you. Here's the other site: