But for some reason Sony USA stopped selling these on their website http://store.sony.com/p/Sony-TV-Stand-for-55-Inch-KDL-55HX850/en/p/SUB553S#features
I have one for my 55"NX810 and the bunchin stand I got is universal because it came with different power socket connectors for different regions. I'm assuming it's the same with this stand (but I could be wrong) and so you can try ordering it from out of the country. My stand was made in Malaysia.
Sony Bravia KDL-55W900A LED/3D TV.
Sony BDP S6200 3D Blu ray Player.
Sony 5.2-Channel 4K A/V HD Receiver - STRDH540.
Center Channel Speaker: Tivoli Signature Series.
Tower Speakers: Sony SS-MF315's.
Surrounds: Pioneer Satellite Speakers.
As a (potential) HX850 buyer I do feel kind of snubbed by Sony. I'm sure they have their reasons for not including it in the U.S. version (maybe Sony believes Europe is more style conscious) but it's still disappointing. The plastic stand may be practical and useful (and perfectly fine) but it's a big step down from the metal version.