Here is the best site for you to check on. http://screenprintedtshirtdesigns.com/
They have the cheapest screen printed design shirts!
Oh, I saw that commercial...was it the metallic looking stuff? I just came across that Alex one, but that one isn't the same...My DD also thought it looked good, but for the life of me, I can't think what the brand was! I'm sure I'll see it again during the many episodes of spongebob and if I do, I'll try to remember to re-post!