I've never had one and the only ones I've ever heard about (which is very rare) are mom's actually pimping their kid. Last one got busted last year. It was all over the news if you recall. Word spreads real fast and gets the attention of cops right away. Good luck but I honestly think you're going have a hard time finding a genuine combo that's not.
My own advice ethics aside: Be extremely sure it's not a pimp situation. Especially if it's on some West End street, or like Alexander or something -- If so forget it dude, not worth a second thought because it's BiG trouble guaranteed. Maybe Syndie and Mystique could instead do the role play for you?? Just a thought.