As of today, I have a Spreadshirt shop. Please visit! And if there's a design of mine here on DeviantArt that you'd like to see converted into a tee or something, let me know and I'll try to oblige! I have very few pieces there at the moment, but I intend to expand my offerings. I of course need to be mindful of copyright and trademark laws, but one advantage of my minimalist style is that many of the designs, being much more suggestive than literal, are probably fair game.
I've found Spreadshirt to be quick, high quality, and reasonably priced. Let me know if you have any questions or any trouble dealing with them.neilkristian.spreadshirt.com/