When I was looking I could not find any Soilmaster in Canada.
Turface is the best equivalent in Canada. Theres a place in Brampton that caries Turface but don't remember the name right now. Its only available in the regular light red/clay colour though.
Do you know anyone in the states willing to bring some up for you? I had a very friendly contact(who regularly comes back and forth) pick some up for me then I payed him for it. I wanted the charcol that badly.
FYI, soilmaster red and turface red are so close to the same product visually that it appears irrelevant which on you have. I should also say that I've been unable to find turface in western Canada but have found an Oildri distributor.
You need to find the gardening places that do baseball diamonds or golf courses if you want to find this stuff.