Japanese clothing manufacturer Uniqlo has released the first of at least two Gatchaman T-shirt designs. The first one, featuring clips of the characters' faces, is here: http://store.uniqlo.com/jp/CPaGoods/056653-09 The second design, due out by the end of this month, will be white with a small bird head symbol over the left breast. Both shirts will cost 1,500 yen each.
The site, of course, is in Japanese, and Uniqlo doesn't do overseas mail orders. However you may be able to order through Celga.com
There's even a video commercial for the latest line of shirts, including the Gatchaman design:
Many thanks to Tatsunokofan for the information!