So ShirtaDay.com has a "Defense Wins 6 Championships" shirt today. I just picked one up. The way it works is that the more shirts that are sold throughout the day, the more the refund grows, and then the next day, once the shirt is no longer up, everyone receives the refund amount from the end of the day. So, the more shirts that are sold, the more I will personally save, so go buy one today as well.
Link to the shirt