How about a T-Shirt that says on the front "Crossdresser" and on the back a target that with a hole in the bullseye?
Seriously thoughts like this go back to the concept of the dreaded "P" word.
I guess I just shake my head. There are only so many ways to tell people to be themselves. I guess some will just slip through the cracks and never REALLY see the light at the end of the tunnel.