There might be. There was a delivery delay on Proto-Advantage's Netduino Pluses and I think they cautiously listed a few fewer Netduino Pluses for sale than they were allocated. They ship to both Canada and the United States. I would write them and ask if they have any left. If they do, it'll just be a few--but that's your best bet.
I think MakerSHED pretty much sold all of theirs at MakerFaire NY over the weekend.
Chris

I'll call Proto and see if they happen to have any left in stock... Maybe I can scrounge on up that way.