I was on the web and found Terrence Popp.  The guy makes me laugh, but he makes the reference "Space Ghost" frequently.  This reminded me that I used to watch SG when I was a kid, and I did a search.. Unbelievably, I found this piece of nostalgia.  Granted I think this is more from the Space Ghost Coast to Coast that they did some years after the actual cartoon, but still, cool tshirt.