I love the "Steempunk" looking one. You should definitely put these up on Zazzle or the like - not an endorsement of them in particular, but they let the customer choose shirt quality (American Apparel vs. Haines, for instance) at different prices, and have all sizes and most colors in stock. I've never done it, so shop around for whoever gives you the best cut and us the best price :) But I'd love to score one of these.
Edit: Is the logo copyrighted? I did not know that.
Hi bradvanceauthor, thank you! Re: Copyrights. Copyrights in Europe and the USA are different. I just don't want to run into any troubles using a logo I didn't create myself and make $ with it. And you'd rund into huge troubles where I live. It's just about to be safe.:)