sure. this is how i got it: follow the link to the design challenge [link]
then click VEIW CHALLENGE DETAILS
then hit DOWNLOAD ASSETS & TIPS in the "step 1" box.
the package you download will hold a variety of folders, one of them labelled "T-Shirt Template". it comes with blank Black, Grey, Navy, Red, and White TShirt Templates. If THAT doesn't work (because the contest already expired) try the same thing at DeviantART's new contest page: ( [link] )