What if the French aircraft industry had set up a licence manufacturing plant in Quebec in the 1930s, in a similar manner to the way various British companies set up Canadian subsidiaries? The plant makes a sterling contribution to the allied war effort and becomes a source of great pride to both Quebec and France, which makes it politically difficult to run down in the post-war contraction. The result is several French types being licence built in Canada for both domestic and export use.
(Note that I have no clue about Canadian internal politics, so you'll have to re-write those bits yourselves..)
Some possibilities:
The Super Mystere is bought for the RCAF in the late 1950s in place of later Canadair Sabre batches, due to it being faster. It's basically the Canadian equivalent of the F-100. They might have Orenda or Avon engines.
The Mirage IIIE is bought for the RCAF instead of the Starfighter and/or the F-5A. Again, it could have Orenda or Avon engine options.
The Alpha Jet is bought for the RCAF to replace the CL-41 Tutor.
The Jaguar or Mirage F1A (attack avionics) is bought for the RCAF instead of the F-5A.
The Mirage 2000 is bought for the RCAF instead of the F/A-18.
Canadian/Australian interest gets the Mirage 4000 into production.
The Puma/Super Puma is bought for the RCAF/RCN instead of some or all of the Hueys/Griffons/Sea Kings.
The Gazelle is bought for the RCAF instead of some or all of the Kiowas.