You can have your own online T-shirt shop in about 3 minutes.
http://www.cafepress.com
I just designed and ordered two "prototype" T-shirts for the hotel. We'll
see what they look like!
Good luck, let us know how they turn out.
I hope you included a dotted line on the back above having the words "cut
upon first solo flight" ;^)
Regardless, I hope you don't lose your shirt on the endeavor.
(Ok, I'll stop now)