So i recently bought a 15 inch mbp 2017 and I'd like to buy AC+ for it, but AC+ is only available in the US, not Canada. I was wondering if I could buy AC+ from the US website. Is it possible? Would they still honor the AC+ here in Canada? Thanks
No, if it's not available in Canada then there's no way to get it. Apple is pretty good at making sure there are no loopholes for their policies. You probably noticed if you ever tried to buy an Apple product from them or a 3rd party in the US.
The only way you could get it is if you wait to purchase AppleCare and hope they release it to Canada before 60 days but I wouldn't bet on it.