I know of at least one Spitfire, a IXc, serial number MK210, flown by Lt.Col Gustav Lundquist of the USAAF, Test Section, Boscombe Down, which made an emergency landing on Greenland while returning to the UK from the US. The Spitfire had been testing long range tanks at Wright Field. He was stuck there for a while awaiting spares, but I would imagine that they would have come from the UK rather than Canada.
Cheers
Steve