You may want to check russian social networks, such as www.ok.ru
, and you will need someone who knows russian to help you. If you have brothers, their last name will be Zarubin (Зарубин). If you have sisters, their maiden last name will be Zarubina (Зарубина). I did a quick search and there are several Zarubins in Sayanogorsk. I would write all of them and ask if they ever heard anything about your family. I can help you with this if you'd like.