Yeah, sobeys has popcorn kernels with the maple leaf on it. I inquired in store if that meant that the corn was produced in Canada, and they said yes.
Inquired with head office when I got home, and it's actually from the States. No fucking Canadian connection, other than it being sold in Canada, apparently.
For anyone looking, Giant Tiger has popcorn kernels that are a product of Canada, so the best you can get in a retail store.