Hi Valo,
There are some maps from 2004 - that I don't think come with the game (some do) - you can download here:
http://games.groups.yahoo.com/group/...es/files/Maps/
and here:
http://games.groups.yahoo.com/group/SPWW2/files/Maps/
You will probably have to join yahoo groups though.
Can't you also download campaigns and scenarios and extract the maps from them? Because there's quite a few camps and scenarios there too.