The US was talking about relaxing the ITAR rules but not sure if it happened or not. Basically it's the US side that has a problem with you taking possesion of a firearm or ammunition and exporting it without a permit.
irunguns.ca can import for you.
Cram an old 500 engine into a late model frame.
For example:
https://www.kijiji.ca/v-dirt-bikes-motocross/strathcona-county/2006-kawasaki-kx500af/1595821014
Called 10 companies in an expanding radius, 1 said no, can't fit it in. 6 haven't bothered to call me back, 2 promised to come to site and look but never showed up. Last one said they might be able to fit it in but aren't sure. Think I'm in the wrong trade, screw gas compression, I'm gonna take...
https://www.rebelnews.com/fire_the_judge
Whether you like him or not, having a judge try and force someone to repeat the government mantra is disturbing...