Ditto this ^
http://www.zazzle.com/hula-hoop+tshirts They have some in 2xL. I agree though the more people making hoop shirts the better.
i have two artist friends working on two designs that i will commission a local shirt maker to make once i get the art work back....the interest in the shirts is pretty high from friends and fellow artists so will have a test run batch and see how it goes (and let yaz all know too, of course)
i would wear hooping shirts, definitely :o)