I have registered myself with RedBubble which is site where I can upload my work to be bought as prints etc (its even got t-shirt design capability which I’m having a look at). If your interested, here is my artists page – LINK.
EDIT: I went a designed a quick T-Shirt 
I am Adam "Lurch Kimded" Howie, I kinda run this website, not very well but it is mine... all mine!!! (cue evil laugh) 