Unfortunately buying Buckaroo gear in Ontario is a real challenge, some tack shops have cheaper quality bosals and mecates but are lacking in quality gear and a range of options. At this time it is best to order your gear from Great Basin area saddle makers and tack shops.
I have bought good quality equipment from Freckers in Montana, R.C.Bean in Idaho, and Buckaroo Leather in California. You just have to remember to convert to Canadian dollars and be prepared to wait for the mail