The source of the parts kits seems to be from Zimbabwe to the outside world during one of their frequent foreign exchange crises. A few fellows on the American FN boards have publicized their finds. Similarly, a few authenticated Rhodesian rifles have squirted out of Southern Africa. I think that was long after Canada declared the FN FAL as a really really bad gun. So, chances of one in Canada are very unlikely.
There are FB groups on Rhodesian living history amateurs. Now that real Rhodie kit is quite scarce and pricey, there is a growing trade in repro shirts, pants, jackets and caps. One fellow I've seen lives in Portugal.
If you want to go down that route, research 'GAG!' air-soft Belgian FN FALs or British L1A1s. They exist and if carefully inspected, can be imported.