I've just found a nifty site which lets you put your own logos/slogans/pictures etc on t-shirts and prints them for you - for really cheap! UK guys can get £3 off - put the code 'FREE' in when asked. And there's loads of different styles of tops - oh, and bags/hats too! Too much choice!
You can basically type up any text you want - so if you've got a favourite Who quote, you can have it! I can't speak French, and although I can speak German, I'm a little rusty, so if you're needing those sites, the link is at the top left of the page below.
Now, to decide what to put on it...
http://www.comboutique.com/shop/design_your_own_t_shirt.html