The Gundam Wing T-Shirt has been re-released.
It can be pre-ordered here. I do a lot of buying from CDJapan and am very pleased with their service. They've expanded their shipping methods to include Airmail and SAL, which lowers the shipping costs. They ship very fast and package extremely well.
I bought the T-Shirt when it came out the first time, and I absolutely love it. Great quality, especially the print. And it feels very nice. I just don't wear it, because I don't want it used up... :)