When I could not find any snails here in Yellowknife for my aquarium, I ended up buying from a place in BC.  My 3 little snails have created a wonderful healthy colony of rams horn snails.  They are so stinking cute, fun to watch and do a wonderful job at keeping my aquarium clean.  I have learned a lot about these little guys.  They are super low maintenance. Available at $5 each.  email or text my number for more details.