Amazon.ca is even iffy a lot of times. It seems every time I look up a classical CD, it's coming from one of their 'not really Amazon' sub-stores, often in Europe.
However, I've actually had great luck so far with a couple of the European shippers in books though, I received a couple of books from England faster than ground shipping would get them to Canada from the US. One was also a book version not in print in North America, which was nice.
Anyway, sorry for digression. I was going to add,
CD PLus is Canadian and seems to have a good selection. I have never checked them for SACDs though.
