Have you tried searching Russian sites for an answer. It would seem Russia would have software that reads Russian. For example:
http://www.sakrament-speech.com/products/tts/tts4/http://www.sakrament-speech.com/products/tts/Then you can create your own:
TTS Builder 1.0 Software ID: 28105
TTSBuilder allows engineers to create their own Text To Speech Voice or Language using High Quality Open Festival Speech Synthesis Research. A complete step-by-step manual for such a creation is included in the retail version. The evaluation version has one such British Voice created using the mentioned step-by-step techniques. The TTSBuilder converts the heavy technical research oriented documentation into one simple practical guide.
go to here for the TTS Builder sample download:
http://www.bluechillies.com/list.html?k=tts,3Smokey