Select Amazon Titles Not Available to Ship to Canada

[martydmc12]

Apologies if I'm completely out-of-the-loop and if this has already been established as old news, but I've been noticing there have been a few select titles available on Amazon.com, but when I go to add it to my cart it shows as unavailable (out-of-print/out-of-stock). Yet when I login through my VPN under a U.S. IP address it shows as available, but when I add it to my cart to ship to Canada it says it's not available to ship to my location.

Titles I've noticed like this are The Rocketeer and Kingdom of Heaven: Ultimate Edition. I thought that maybe because they're Disney/Fox titles perhaps it's a Disney thing, as we all know how Disney can be with their gestapo-style business practices. Yet there are a lot of other older Disney/Fox titles that are available.

Does anyone have any idea what's going on with this?