Well it's a possibility that the artist who designed the t-shirt saw the same image in another context also, perhaps in the same zine you even speak of, and the t-shirt is their version. I think it would be nice if someone saw yours and feels inspired and draws their own version, paying it forward also...regardless, it's a pretty special image/concept. Thanks for your honesty and for sharing your work.
I am a comic artist, illustrator, and art teacher based currently out of Boston. I received my BFA in Illustration from the School of Visual Arts in New York City, and am currently working towards my Masters in Art Education at the Massachusetts College of Art & Design here in Boston.