I renewed at
Airways Flygutbildning using their DA-42 simulator. They're just outside of Stockholm - it's a bit of a drive (from Oslo), but I estimated that I saved at least 50% of what the most reasonable provider in Norway would take - despite the additional travel and lodging costs. My ratings had expired, so for a refresher course and skill test the total was 5600 SEK + 1200 SEK for the examiner, who was the same guy
Luftfartsskolen in Oslo has just had a simulator approved too - it was not approved when I was going to renew – so I don't know their prices.
Good luck!