Being a Star Wars fan, I need more Kotor. Even if it means playing SWBF2 mod with a Kotor reskin!
Link for that: http://www.moddb.com/mods/star-wars-battlefront-conversion-pack/downloads/kotor-galactic-conquest

Here's a youtube channel that does SWBF2 mods: https://www.youtube.com/channel/UCcqjNcRr8M-cOpulLTKv4zg
More importantly, on each of his videos' have a link to a file downloader for that mod.

This is his master list of Mods: https://www.mediafire.com/folder/qb6qlt2prdypb/SWBF2_Mods

And this is his master list of MAPS: https://www.mediafire.com/folder/457adu0f9qkp4/SWBF2_Maps

The difference between them is simple, the MODS effect gameplay primarily with characters, weapons, and some maps, I believe.
While the MAPS, is, basically, just a map that may or may not need addition mods to play or to fully immerse oneself.

Furthermore, here are a few other modding websites for SWBF2:
Moddb.com
Nexusmods.com
http://www.gamemaps.com/swbf2/
http://www.gamewatcher.com/games/star-wars-battlefront-ii/mods
http://gamefront.online/files/listing/pub2/Star_Wars_Battlefront_2/

Not really sure about this one: https://www.mediafire.com/folder/c1cdpn9pb99rr/SWBF2_map_collection

The most annonying thing about most of these links, is the lack of description. However, if you get them from the youtuber, he will have a video on it, which at least gives you some idea (even if you only watch half a minute of it).

Hope this helps!