[Interference]

Also, possibly, there's some confusion - to me, anyway - as to what you're looking for. A voice? Is this for recording? Are you an actress looking for a voice to model your character on? Are you doing some weird re-mixing in your home studio? Do you feel you need to "hear" your characters speak before you can do them justice on the page?

Many actresses have done the Russian thing, most of them in Bond movies, but any spy thriller ought to throw up a few options. (See if you can find one with Helen Mirren - sexy voice, but very intimidating)

Many real, live Russian women walk around in most major city streets these days and would probably not be averse to contributing their vocal talents to a few lines you might wish to scibble down for them.

I've probably missed your point altogether - which is why I hesitated before saying anything - but maybe I've given you a new line of thought for your mission - whatever it is.