Despite Microsoft's claim that DVDs with a HD special edition disc are only available in the US, I see that Amazon.co.uk appear to stock a few of them imported from the US. On Amazon UK, the disc cover photo looks the same, but the only other details it mentions is that it's a US import (NTSC Region 1), contains 2 discs shows 'Special Edition' in the detail list.
On the US website, it mentions that an Internet connection must be present and one customer review mentions that the DRM system does this to verify the PC's public IP address is within the US or Canada.
I'm not sure what movies you would be interested in, so here is one classic (Terminator 2) and another (Stormchasers) I came by while searching. Both say they are special editions, have 2 discs and are imported from the US.
T2 Extreme DVD - Amazon.co.uk
http://www.amazon.co.uk/exec/obidos/...601095-7496413
T2 Extreme DVD - Amazon.com
http://www.amazon.com/exec/obidos/tg...s=dvd&n=507846
Stormchasers - Amazon.co.uk
http://www.amazon.co.uk/exec/obidos/...601095-7496413
Stormchasers - Amazon.com
http://www.amazon.com/exec/obidos/tg...v=glance&s=dvd
Just note that as Amazon UK does not actually mention about what the 2nd disc contains (no mention of WMV-HD), so even though it likely includes a WMV-HD disc you may need to use a US proxy service to get around the IP checking.