Central Canada as I understand is the east part except the maritimes, and a big auto-manufacturing area where they build American cars.

http://ebay.ca - no Datsuns currently for sale

http://craigslist.ca - seems most are for sale in British Columbia, but some in central Canada

If you can cross the border, there are some Datsuns for sale in the Mid-west. They say it is cheap and easy to bring them over.