I’ve got an FLL team (11, Baking Soda Volcano) that qualified for the North American Open Invitational at Legoland. There are some pretty good artists on the team, and they wanted to see if any other FIRST teams needed some button or t-shirt art created. They’d also happily accept donations to their trip fund. They designed a variety of unique, tradable buttons for FRC 2723 (Team Rocket) last year at Houston and those were a huge hit.
They asked me to post to see if there is any interest at all in such a thing, so please reply or message me if you are and I will pass it along, or you can email them directly at firstname.lastname@example.org if you want a sample of what they did last year or what they could do for you.