Go back in time to 9/21 and order them from apple.com. Then you'll have them in the mail today like I did. Seriously though, its a new proprietary connector so the only place you'll get one is one that sells Apple stuff. In time, they'll be everywhere, but Apple can't even make them fast enough right now.
For the next 2 weeks its gonna be hit or miss at the apple store. I live about 15 mins from my local store and i'm just hoping to get lucky. I didn't realize how many 30 pin cables I had. I need more lightning!