Sissel, I have this cassette - (Re: side two: Det Lyser En Sol) - of yours which I bought in Norway on a Winge tour in 1990. I played it over and over and over. It's a wonder I haven't worn it out. It's a mighty cassette because it still plays well.
I am Norwegian and I can see if there are someone you can call here. Unfortunately it's only trough internet and the customer service is somehow quite bad........ You'll might have to be patient. Edit: Platekompaniet.no has got this and some more albums from her. I have myself both kassettes (at the time) Sissel (where this song is from) Sissel Glade jul (Silent night Christmas album that was sold out in nearly one day which understandable) and Soria Moria. I can reconmend them all. This is the best! I can do I'm affraid, but don't pay anything before you get them. Just order and see if they turn up. I don't have the best experience by contacting them I'm affraid. I have sent E - mails without any respons at all. However, this is the only company I can see that has this album. I'm so sorry that I couldn't be anymore helpful. Good luck.