I'm surprised that no one has modelled Russian trains for any modern simulator. Apart from Russia being a flaming big Country with lots of people (and thus a higher target market) the satellite Countries of the former USSR had much Russian built stuff.
A little known fact that in 1986/7 (can't remember which) I drove a Russian built express train- right past a naval dockyard and communist party local commandants house. I bet not many people here can say that!