Good luck with your search! Importing a built and finished car can be done. According to Transport Canada, a finished kit car can be brought in, as long as it was fully-finished 15 or more years ago. Then it qualifies as age-exempt, and while it still needs to be safe and roadworthy etc, it can be imported. Anything newer than 15 years old is subject to all the normal ‘new car’ regulations, compliance with which will likely be prohibitive.
Of course, you’ll have to pay for shipping/transport, customs duty, and whatever taxes your province charges. And the registration fees of course. As with all such procedures, if do it right, provide all the right documentation at the right time, and follow all the rules, it’s definitely do-able.
The issue of course is always cost - if you find one in the US for say, 25,000, by the time you’ve converted USD to CAD, transported it, paid the taxes etc, it’ll end up being closer to 40,000CAD by the time you’re driving it. Which explains why a. They’re rare in Canada, and b. They’re expensive.
I’d like to say that I’d been through it all and had first-hand experience of the above, but I lucked out and found a great base car close to home. However, I did a ton of research before that one popped up, so I do know that the guidelines above are true...
Whatever - it’s still totally worth it! Much better value and much more fun than any other $40k car out there.
good luck again!