Hope you're doing well, Denis.
I think the percentage of foreign companies without a US repair facility is well over 50%. Based on the experiences I've had in the past few years, I've more or less come to the conclusion that a company not based in North America that is unable/unwilling to pay someone in the USA to support their margue and all that's involved in doing so is a company not worth patronizing.
By the way, this is definitely not something between the people or governments of Canada and the USA. The problem is the shipping companies who have folks working for them enforcing draconian, onerous, and outrageously priced policies. NAFTA sure didn't benefit the high-end audio customer. Most will find this difficult to believe, but my shipments from China were far, far, far faster and less complicated than those I was involved with in Canada. To the point where we finally went to having the gear I imported directly into Canada from China, as opposed to coming to me first.