Did you get these shirts organised?!?Working on one as we speak, as a real low priority project (but with my priority management that doesn't mean a whole lot).
Will post it on my RedBubble when I get it done, unless any of the 'folks in charge' like the design and want to do something more "official".
Also, the cool thing about RedBubble is I can easily (if not simply) personalize them so you will have a shirt with your own profile icon, if that tickles your fancy.