Ask HN: Where to buy Twitter followers (as a gag gift)?

I'd like to buy an outrageous number of twitter followers for a friend's account on his birthday. Zero expectation that it'll have any real impact on his profile - it's strictly an absurd joke of a gift. The trouble is sorting out where to buy followers (bots or real, preferably a mix) from a 'reputable' company that won't just run off with the money. Considered emailing someone on the Romney 2012 campaign but short of that I thought someone here might have the answer.