I think they are considered invasive in Canada, so you won't easily find a source for them. I would look into different roaches or perhaps worm or cricket options if possible, since those might be easier to source.
Best I have been able to find is the Probugs Eco-Fresh Dubia - they are freshly preserved and while not suitable as a staple they have been handy to have as a backup. Northern Gecko sell them. There’s also a decent aquatic/reptile store i found downtown Vancouver sells them in single packs (5 roaches) if you want to give them a try.