Just thought I'd share this, since it's an awesome find and I imagine they will eventually be gone...
Paizo is selling Warduke t-shirts for just $10! They only have them in XL, but hopefully you didn't eat too much over the holidays and can fit into that. Not sure how much shipping is, but I had mine shipped with my monthly subscription.
Here is the link to the shirt:
Paizo Dungeon Warduke T-Shirt