Yes, there does seem to be some 'warehouse' type Canadian webstores, though they are not as well advertised like Squadron, SprueBrothers or Hannants for example. Another one I have found is in Montreal, Udisco. True, ordering from Canada will negate the tariff issue, but you likely will pay either a provincial or federal tax, based usually, on an even higher priced kit.
I'd suggest to shop and compare. Check the prices/availability of the Asian webstores LuckyModel.com and HobbyEasy.com -note, only order if the item is listed as in stock! These two both provide an option to declare a lower value on shipped items so can avoid the tariff cost.
regards,
Jack