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
Canadians are lucky... they get all the European chocolate without the tariffs. However, I only live but 2 hours from the border, so if I really want it, I can get it (in bulk, of course) cheap. No reason to move there.