XO's are no longer sold to individuals. Can buy used ones on ebay.com .
Consider "Sugar-on-a-Stick" which is free software used on the XO but stored on a memory stick. The memory stick can be booted on many PC's. This can be download from:http://sugarlabs.org
See this link for group in Russia:http://wiki.laptop.org/go/Projects/XO_pilot_projects_in_Russia
Some Russian groups run "jabbers", which are computer servers for XO sharing on the internet.
Their email addresses might be points of contact:
azmar at jb.tr3.ru
postmaster at mail dot xost|\|ame or students at LETI with web site http://www.eltech.ru
art at shesha.ru