Ive done some clean up on the RC server, and now you will only need these two custom maps. After issues with server map rotation (which is still being worked on) and with some of the custom maps being either too big, or just uninteresting.
(Wiki page has also been updated)
If you do not know where to put the maps below will help you place them correctly:
CD Users: C:\Program Files\LucasArts\Star Wars Republic Commando\GameData\Maps
Steam Users: C:\Program Files (x86)\Steam\steamapps\common\star wars republic commando\GameData\Maps
So below are the links to the maps.