That hasn't happened to me yet, but if it did I'd find every interesting, somewhat relevant geeky meet-up in town and start going to them. Obviously don't openly declare you're there to recruit someone, but if you stay aware and know how to spot hackers, you're bound to find a suitable one who happens to be contracting or unhappy about their job... Basically, expand your network :-)

The problem with this is of course that you don't have a clear deadline on when you get the person, so it's best started early while you can still wait.