ISO: Smoked Duck Breast
Cumbrae's has them.
As does Whitehouse Meats at St. Lawrence Market.
Call around some of the quality butcher shops nearest to you, and it could be more convenient than these two places.
481 Church St, Toronto, ON M4Y, CA
St. Lawrence Market
92 Front St E, Toronto, ON M5E, CA
I saw (and bought) it recently at Bruno's (Yonge N of St Clair; but presumably available at other outlets).
It was in the pre-packaged deli/cheese section when I first saw it, but was 'absent' when I returned. I asked and it was available behind the main deli counter, although they only put out a couple on the display. Just ask if you don't see it.