Tire dealers in BC, Washington state or Oregon.

Unless you have a Les Schwab or a Toyo tire dealer you trust I'd go a different route. Most of the Tire Factory stores still name brand tires like Michelin, BFG, Goodyear, etc. Once you know where you're going you can start calling with your tire specs and get quotes. Once you find a good deal make sure they have them in stock and hold them so you're not stuck around waiting for them to be transferred in from another location or warehouse.