Last amateur team to win the Grey Cup

From wiki, neat stuff. I wonder when the last amateur team was to win the Stanley Cup?:

The Toronto R.C.A.F. Hurricanes were the last amateur team to win the Grey Cup in 1942

en.wikipedia.org/wiki/Ontario_Rugby_Football_Union -- article on the old Ontario Football Rugby Union

Far be it from me to question Wiki but, The RCAF Hurricanes were a services team as were the Hamilton Flying Widcats in 1943 and the St. Hayacinthe-Donnacona Navy team in 1944. I would think that both these teams would be amateur for the same reasons that the Hurricanes were.