Well you can check in google maps which city is close enough to you. Then try to find some parts selling company, through google or Fonecta.
http://www.fonecta.fi/mapsearch.ds?newS ... mapLevel=8
Like there. I selected Suomussalmi as city, and typed "varaosat" as keyword. And found that there are at least 4 parts selling companies.
Then I would call them, and would ask about used or new part.
Then you can try to google with keywords "Saab 9-5 - Ohjaustehostin Pumppu".
http://www.autopurkaamot.com/naytaosa.php?id=148137
Also if you don't speak finnish, then use
http://translate.google.com/ .
You can enter there text, or website link, and push translate, and it will translate the whole website.