There’s a lot of good smaller-brand bread brands. As mentioned in another comment. Though because they’re smaller they have a smaller reach so it some what depends on what part of the country you’re in. So what province are you in?

Also I was looking this morning for some gluten free oats/flour brands and came up empty handed. My house heavily relies on Bob’s Red Mill

Also St Pierre and Miquelon are less than 20 km off the coast of Newfoundland