Columbia games produces several game, for example Wizard Kings, which have good hex-maps. Wizard Kings have 12 geomorpic maps which can be linked in any way, for an example
(see here). Of course, there might be copyright issues, so I don't know if it is a viable suggestion...
Personally I use the HexMapper program when I need to do hexmaps for some campaign settings (be they worlds for different RPG's or campaign enviroments for miniature games (like DBM or Warhammer for example). The HexMapper program can be downloaded from
here.