If you want a t-shirt for the new PW3d-website with a new logo, you can find it here:
There are 3 different motifs, which you can combine with various T-shirts, hoodies, bags and the like. These are the short URL, the full URL and the new logo. You can even put these in different colors, but I would only recommend an inversion, depending on whether it is a dark or light shirt (etc.).
And now I wish you a lot of fun trying it out :).