yes, it can be tricky to find in my town too. I had to find it in a Sobeys in Stouffville when I was driving thru one day. Not too close but they had it. The Sobeys at my corner did not have it. There were no other stores and yes I asked everywhere. It is called Freezer paper.
When I took an applique class they sold me some at about $8 for a yard. I got a whole box for about $12, talk about taking advantage of the situation.