Kellam is a big re-seller who sells many finnish puukkos from many different makers (mostly factory made). So go to their pages and look which puukko you mean. Maybe I know the maker.

http://www.kellamknives.com/index.php?main_page=index&cPath=1_33

Below is two links; first one is the Finnish Knife Associations homepage. The other link goes to the list of members homepages. There you can find the best makers and puukkos from finland.

http://www.puukkoseura.fi/english.php

http://www.puukkoseura.fi/linkit_kotimaiset.php