I just got back home. Walmart, Canadian Tire, Home Hardware, Rona, and our local craft store and the local stationary store don't carry them.
I forgot to try staples, maybe I'll try there next.
UPDATE:
WINZ and Staples Deliver!
I would've also suggested a car parts store. At my work, we sell grease pencils that garages use to mark tires.
Glad to see you found some, though.