It looks like there are many native Finnish speakers on here, including three teachers.

http://www.italki.com/partners#learn=all&speak=finnish&native=1&page=1

http://www.italki.com/teachers/tutoring#teach=finnish

I think it will be easier for them to find your messages if you post them under Finnish. I believe you have to add Finnish to your list of languages on your profile first, though.

Good luck!