Yes, about B & M standing for brick and mortar, or a regular store. You can search vape shop, or vaping supplies for your location/city, and see if there are any local vape shops in your area.
For online, just use google and type in whatever you are looking for by name, and you should get lots of hits with online vendors who sell that particular thing.
Also, lots of folks have good luck buying vape gear and devices, like tanks and batteries, on ebay. They aren't allowed to sell e juice, but selling vaping supplies seems to be okay. There are quite a few reliable vendors on ebay. If you read the feedback and it's positive, you should be okay buying from them.
Here is a link I found for your area using google:
Smoke Shop in Thief River Falls, Minnesota with Reviews & Ratings - YP.com