As most of us know, CC&F was producing Hawker Hurricanes and other aircraft for the war effort as early as 1940.
Tell me I'm crazy, but I've often thought that CC&F's factory in Fort William, Ontario (today's Thunder Bay) is ideally placed for producing aircraft for the Royal Navy:
1) CC&F is a smaller producer, suitable for the smaller aircraft volumes needed by the FAA.
2) It's well beyond the range of Axis attack.
3) Completed naval aircraft could be flown directly from the plant to Royal Navy aircraft carriers at Quebec and in summer months at James Bay, plus
if needed to Esquimalt (a Sea Hurricane would need to make one fuel stop to make it from Fort William to Vancouver).
4) Also, equal to USS Wolverine and Sable, the RN could start the FAA naval aircrew training scheme on Lake Superior.
So, here's my ATL. Late 1930s, naval aircraft production transferred to Canada, with CC&F focused on monoplanes like the Sea Hurricane, Skua and Fulmar. Meanwhile, De Havilland in Toronto is already making Tiger Moths, so they start Swordfish and Albacore production as well.
Tell me why it's a bad idea. The biggest challenge is engine supply, as IIRC, there is no high performance aero engine manufacturing capability at this time in Canada, with the early Hurricanes made at CC&F using Merlins shipped from Britain, and other types using smaller engines from the USA. Perhaps P&W Canada can be persuaded to produce engines in Canada.