where do you get n95s or kn95s or whatever masks are supposed to work good for not a lot of money (if you're in Canada)

where do you get n95s or kn95s or whatever masks are supposed to work good for not a lot of money (if you're in Canada)
was pricey but we spent the cash on a Flo Mask, and it helped quite a bit until now, especially with the wildfire smoke too.
Caught it this week, probably on public transit, but unless I was in full SCBA that was bound to happen sooner or later :/
Pharmacies like Lawtons or Shoppers sometimes have good prices on n/kn95s.