This is all i could find for you;
http://www.wipeoutzone.com/forum/sho...533#post213533
http://www.wipeoutzone.com/forum/sho...hlight=t-shirt
http://www.wipeoutzone.com/forum/sho...hlight=t-shirt

There's a lot of mentions of it, but nearly all of them point to dead links.

Top 1 mentions it on ebay, but the listing has ended a long time ago, therefor no longer viewable
2nd one is sexy as hell, but not what you're looking for i recon
3d one has more mentions of it, but dead linkies :/

Google itself didn't really give me anything useful either, just a lot of advertising for custom prints and a couple pulse press kit shirts, but also not what you're looking for (they're easy to find with that search term if you're interested to see them tho )

Also saw mention of shirts sold at the 2007 convention, but no pics unfortunately

So unless someone here, who's still active & has such a shirt, it'll be tough finding, but i'll let anyone fill in for me if they can!
Hope it helps, if only a little

Cipher