It's kind of you to offer - but unfortunately both Zazzle and Cafepress won't let people order something with a design that they deem a copyright infringement even if it's not offered publicly. Believe me, I've tried. You can place an order, but they'll cancel the order and e-mail you to tell you that the design is copyrighted. I've been able to get away with some things, but not with others, and there's no way to tell until you put the design on the site and try to place an order.

Good luck! And I hope you're able to find a way to offer these designs, because I think they're brilliant.