I saw a little bit of the diamond shaped fabric that is the background for the games and found a website that has some info.
http://sochi2014.bosco.ru/en/
That should take you to the cover - beautiful in itself, then select "look of the games". You can select each diamond for a closer look at the print and click again for the piece of art that inspired it.
As far as I can tell, none of the fabric is for sale (please correct me if I'm wrong) But WOW.
site is in English