This is interesting. Montreal ACC was unable to give a pilot the metar for CYFB Iqaluit, he provided CYVP or Kuujuak. Now, if anyone encountered a problem like this before, what would YOU do if YOU could find something that ATC or ACc could not?
In the US, I would contact Flight Watch on 122.00 or Flight Service on their closest frequency (an IFR-certified GPS will provide the pilot with the frequency for the nearest FSS). The advantage here is that these services can also give you satellite, radar, and nearby weather information.
It is very common in the US to find ATC facilities that *cannot* provide weather radar services and therefore cannot give advice on where to fly in their sector to avoid heavy thunderstorm cells. This is due to the limitation of their equipment (think budget cuts). Again, Flight Watch or FSS is your answer.
I suspect that Canada has a similar service, but I only flew to Canada once (just over Lake Ontario into Toronto), so I couldn't say for sure.