Try to call the Train Company in Finland and see if they can help
Travelling by train in Russia
You can buy train tickets in Finland to many cities and lines in Russia. You must book a seat to all domestic trains in Russia before departure of the train.
Cities to which you can book a train ticket
Tver
Vyborg
Petrozavodsk
Joskar Ola
Vladivostok
Irkutsk
Nizhnyi Novgorod
Omsk
Kazan
Kirov
What cannot be booked
Seats cannot be booked for trains between Vyborg and St. Petersburg or St. Petersburg and Novgorod or other local trains. Business class services of long-distance trains cannot be booked in Finland.
Train service level
Tickets can be booked in Finland for 1st and 2nd class seats and berths.
Some trains have a restaurant car
Berths are not sold separately for male and female passengers.
A bedding fee of €3-5 and other service fees are paid onboard the train
Russian timetables
Russian domestic timetables can be viewed on the Internet in e.g. the travel service of the German railways. VR is not liable for the correctness of the information.
Travel service of German railways (DB)
Further information and bookings by tel. 0600 41 905 (M-F 8.30-16.30), price of call in Finland €1 + local network charge or with a form. Tickets are sold on the stations in Helsinki, Joensuu, Kuopio, Lahti, Oulu, Seinäjoki, Tampere and Turku.
Tickets and details are also provided by travel agencies selling journeys to Russia.
http://www.vr.fi/heo/eng/ita/fjunavenajalla.htm