Hej Morgan, don�´t know of any dealers (the second-hand market has just about died since the new 5 year license law came into effect - before they were issued without a time limit imposed), but the bi-annual (spring and fall) weapon auction here in Stockholm usually has several Lugers up for bidding.
www.auktionsverket.se At the last auction (March 6th this year) there were 3 or 4 P-08s and a few C-96s as well. You can see pictures of the items and the final bids by entering the catalogue page and rolling down to the auction you want info about. The site is bi-lingual (English and Swedish).