I have put up a curated list of Canada camera stores and film processing labs. This came from the need to know where I could get film processed, or get supplies for it.
There is a lot of reasons why you’d want to buy from a Canadian store (when living in Canada), including that some of the supplies, like chemicals for film processing, are not easy to import. Also the prices are mostly MSRP which mean that patronising a local business won’t cost you more.
I hope this is useful.