I am trying to find some roots from Finland also, and also hitting a wall. My family members are the Terpennen/Raatika, I don't know where in Finland they came from other than arriving in the US in 1896 and changing the name to Turpen. Anyway...
I did have someone contact me saying that there is a gentlemen doing research in Finland for a price. Unfortunately I have not contacted him yet to see prices or anything. His website is:
www.famangle.com if you want to look into him. Good luck and if you find any other hints I would love to share info if possible.