They are currently only available in the USA. Should be in Canada late Jan or Feb from what I read (if I am recalling correctly). If you want to read more there is a big thread over on Redflagdeals about K-cup deals, availability, etc. I picked up a box of the Sumatra blend at Macy's in Buffalo. They are available there and at other stores if you can't wait. I think there may be a possibility to order them from the USA k-cup store too but I haven't checked it out.
I would assume you could order from Keurig. I use a My K- Cup (which I adore, FYI) and wanted more of the little filters that fit inside. You can only order them directly from Keurig. If you spend enough, they ship free to Canada.
(there is an authorized online cdn spire for the filters, but their shipping was crazy. It was cheaper to go straight to Keurig)