What I did was to go to the lokal sailmaker (North Sails)with the drawing that Scarecrow supplied. He designed the sail from that for no extra costs. I got the first sail for half of the price mentioned above.
As they do everything by special computer programs there is no big deal to make a set of differents sizes.
If there is a local sailmaker working with North Sails you could try to contact him and tell him that there is a design i North Finland, maybe he can get the specs from there.