I found some at Toys R Us, but they're 3 bucks for a 14 oz bag. A little bit more expensive, but hey, you take what you can get.
FYI, they sell dark chocolate Kit Kats in New Brunswick, Canada. They are awesome. I spent a week visiting my parents in St. Andrews, and brought back half a dozen of them.
Yes, they're all gone now, but my mother promises to send more. :-D