With RAL being a European color system, I doubt you'd find a Canadian manufacturer with premixed military colors on the shelf; you're going to have the paint tinted to suit.
But that leaves the next problem, who makes a flat enamel paint base?
THIS THREAD seems to suggest that even that is getting harder to find in Canada. You might find it easier to get one of the American brands like Gillespie or Aervoe and ask them for a tinted mix and have it shipped (and shipping Enamels compared to water-based is yet another problem).