Contacting the authors of Morgonstjärnan 4, Kjell Regmer and Mikael
Börjesson shouldn't be that difficult.
https://www.svenskarollspel.nu/wikia/Morgonstj%C3%A4rnan_4

They run Titan Games that you can find on DriveThru:
https://www.drivethrurpg.com/browse/pub/9987/Titan-Games

They have a homepage (not updated in about 4 years):
http://www.drakar.nu/