I dont know oslo too well, am from trondheim and we have a dreamlands there on kongensgate. No WiF, No EiA and No EU. Go figure, they make most of thier money (like avalon) selling books, comics and GamesWorkshop games.
There is a games store inside Oslo Sentral Station above the ICA in the Østbanehallen. They are also mostly focused on comicbooks, books, action figures and GamesWorkshop. Although they had two shelfs of games there when I was there in 1999.
I bought my copies of America in Flames and Carrier Planes in Flames at avalon.