So Friend of mine owns a small automotive shop in Langdon, just outside Calgary. I was in his shop today and on the shelf he has the Mobil 0W40 ESP Dexos oil. He stocks it and would be happy to bring more in for the Corvette crowd. $17.50/litre. He just recommends calling ahead to make sure he has stock, and if he does not have stock he can get an order in for the next day. The shop is called Langdon Automotive and his phone number is listed on their website.