I want to say that with Under Armour they own all licensing rights for their schools too. There are some bigger companies that also produce licensed apparel for USF but those are mainly on the national level and cost a pretty penny. It's been a few years since I worked in the apparel industry(2010 or so) but that's my understanding of our agreement. Small mom and pop operations would not benefit from purchasing licensing rights as its too small of a scale thus why you can't find them at craft fairs.
Non apparel items should be much be much easier to find and at a better price point for the licenses though.