The LGS I tend to frequent is owned by the same family that owns Bowmac Gunpar which is a large wholesaler and importer of firearms and related products. When I asked there about Unique and Blue Dot I was told Alliant refuses to give an ETA on when orders will be filled but have said nothing about any cancellations, treaties, regulations, or that they are no longer shipping to Canada. It's pretty much just a "we're so busy we have no idea when we'll be able to fill your order" kind of thing. I guess they don't want to make false promises.
IMR powder has been trickling in and they regularly have Hodgdon powders in stock. Hodgdon, likewise, wont give ETA's on when orders will be filled. They just get the bits and pieces of the orders as they arrive.