According to the books Tools of the Trade: Equipping the Canadian Army, Mechanized Flamethrowers in Canadian Service and Secret Weapons of the Canadian Army, the later two by Roger V. Lucy, we had a number of different flame warfare systems during WWII and retained the capability for some time.
According to 'Mechanized Flamethrowers; fittings for WASP 2C mounts were retained at various levels as HQ assets, with several Universal carriers being capable of mounting the system for as long as we retained the Universal carrier. There was a little bit of up and down on this, but in 49, it was decided that each Inf Battalion's carrier platoon would have three and the rest would be kept for training. We also developed a version of the WWII Badger system and fitted it to our M4A2E8 "Kangaroos" though how standardized this modification was I cannot say.
We also developed a new system "Iroquois" which was fitted to universal carriers after about 1950 with a contract completed for 100 systems. This was better than the WASP 2C in all ways, but the terrain in Korea was apparantly bad for the 18 WASP Carriers which were sent and they saw little use. Iroquois was deployed however to germany and to reg force battalions in Canada from sept 1953, but none were sent to Korea.
We used us M2 series flame throwers and Life Bouys in Korea and would have also retained them for some time it seems, but the once-promised forthcoming book on manportable flame weapons has disappeared from the www.servicepub.com website, sadly.
Iroquois was fitted to the Bobcat APC while under development, though an improved system "Cree" was not. From 53 to 56 Cree was mounted in a de-turreted MkIII Centurion, but this was cancelled after passing trials it's before it could be issued.
Sadly, by 58, insufficient parts supplies were causing serviceable iroquios and carriers to decline and flame warfare declined to 1962 when mechanized flame carriers were declared obsolete and ordered disposed of. To this time some systems had been retained at higher levels. it was promised that once Bobcat materialized Cree would be fitted to it, but we all know how that turned out. The book concludes by stating that some manpack systems (M2 series) were retained for training and testing purposes for sometime thereafter.
Even if some were in warstocks, our recent visit from the UN arms limitation people would have seen to them, as they saw to our C1s, c2s, ect.
From a wargaming standpoint, I would however expect flame throwers to be a fixture of any canadian forces unit in anything but a sudden emergency, right up till the 1980s. Historically, we're fond of them and they work, similiar situations tending to lead to similar solutions and history tending to rhyme, if not repeat, I think the conclusion is logical.