Thanks to the assistance of Koyama Press I now have T-shirts for sale! I am selling them for $30 (plus a few bucks for shipping). Please send me an email if you would like to buy one. They are printed in a dark grey ink on American Apparel "Silver" colour shirts. Don't worry, they're not actually silver, they're light grey. That's just the name. However, I'm sure you could paint it silver if you'd like. I have S, M, L and one or two XS.
Here's what they look like: