Is there a local bar where maybe you could do a NIN Trivia competition, with concert tix as the prize? Maybe CDs as consolation prizes...
Most places would be in anything that gets clientele in the door to buy drinks and maybe you could advertise in local papers cheaply with some of your marketing money???
Is there local TV that might cover the madness? Or a local chat show or current affairs show that might do a story on what you're doing ... it's total human interest fuzzy stuffs that they love to do, and the whole competition, being down to the last two is right up their alley. You'd have to ask them not to publicise what B

is doing tho. Or maybe get your mum to call them and gush about you and tell them about the competition, how you're up against a rich kid and doing it tough on a budget blah blah blah...