There is a shop in town that does T-Shirt printing. I will see how much when I am in town tomorrow :-D
EDIT: Right, I've got a mini design mocked up (nothing fancy but does the job). I'll see what they say.
EDIT EDIT: Everyone has got involed now. LordSpatula is finding fancy fonts and DrV is hunting down a 'High Gothic' translation of 'suprise cockbags' for a coat of arms