Alex, I have a suggestion. I play rugby at my university; it's one of like 50 or 60 club sports teams and there are about 10 of them that are serious contact sports. Hockey, rugby, football, boxing, idk all of them. In any case, every club whose sports have serious contact, has to have an EMT present any time we have a game on campus. I'd imagine a lot of universities are like this; I'd imagine a lot of city clubs for these same sports also have a similar policy. If you were to contact them personally (most city clubs and university clubs have a website), explain the work you're looking for, and offer to underbid whoever is currently doing it- I'll bet you could find work. Worst thing that could happen is they don't hire you, but they'll have your name and contact information for any future tournaments or needs.