Wargames foundry have an old bit still very nice range for Swedes and Russians. It is a little small both in range and figure size but still nice.
Reiver Castings have a full range with flags but to be honest I just don't like the figures.
Finally there are the new range of Warfare Miniatures Swedes and Russians, very dynamic, lots of range for the foot, complete with flags but even with the battalion pack deals a little expensive.
I decided that the best thing to do was trawl ebay for cheap figures and pick some packs of the new ranges up and have a play.