This is a well known link.
Very much of the blueprints and the manuals are there for free download.
If you miss one blueprint sent a message to the finnish authorities.
Mr. Markku Hiedanpaa ( one former PIK ingeneer ) is a member of the finnish aviation office.
You will have a good chance that someone of the assistents does a pdf copy and sents it to you.
They helped us very much with blueprints time ago to get a broken 20E back in the air.
Best Regards,
Joshy