I dropped Warner an email asking if the titles would be made available overseas, or at the very least through Amazon so they can be bought and sent overseas. No response as yet...
They won't do it. They'll cite international contracts and various rights and clearances and all manner of thing but what it all boils down to is " this is here, that is there, deal with it"
I recall when Warner Bros UK was releasing Babylon 5 on home video long before it came out here, and Warner Bros Japan whipped out ER on DVD faster than here in the U.S.
you're 100% correct, it's supposed to be a global marketplace. But it's not. It's global when it's easy.
Just look at Amazon UK and Amazon Japan and see all the content restrictions "Item cannot be shipped overseas" .
And since these titles from the Warner Archives are burn-on-demand discs, there is no interest in selling outside of their own store because that would reduce their profit margin.
What I might suggest for our overseas friends who want these movies, look around online for 'proxy' services, people here in the U.S. who bid on stuff on eBay and such for products that have a 'will not ship or sell to overseas' block. Yes, you'll pay a fee for the service, but it's one sure solution.
another, of course, is contact a friend with a credit card who'll order it and ship it to you. (don't ask me, I have no card and no money otherwise I'd be PMing people, sorry

)