I've been working on the tee-shirt issue. I have a design I like, the problem is getting it made. I looked into CafePress first, but Zazzle has more options for garments, particularly in dark colors.
Unfortunately, I'm a bit stymied by software. To get a true white-on-dark image, I have to create a transparent background for the image, and the Corel software to which I have access will not export the PNG's correctly. I'm looking into a source to get around that.
In the meantime, I managed to use Zazzle's default conversion method to get a passable mock-up of the shirts. The front looks okay, but the back may not be legible enough. We ordered one as a test sample. But if you want a preview...
You can, of course, go ahead and order one if you just can't wait (I know what that feels like, it's why I had to post). But I recommend waiting a couple of weeks until I (hopefully) get this transparency issue resolved.