There are 3 outfit sets in game that should be available to players for RP reasons.
https://i.imgur.com/1KW01Wq.png
The first is the Trooper's starting outfit. Throughout the game, this outfit is used by Republic soldier NPCs as an enlisted duty uniform. There is only one set attainable by the player and its only for new characters and is considered trash loot with no way to acquire it again (outside of asking customer support)
The second is found on junior officer NPCs, lieutenants and captains.
The third is found on senior officer NPCs, most obviously the "Republic General" stronghold decoration.
It would be nice to have actual duty uniforms for both my characters and companions. I find it silly the only available gear for the Republic military is combat gear, especially since Empire characters get a variety of duty/dress uniforms to choose from.
(While the Republic officer uniform from the CE vendor is an option, it shouldn't be the only one. Especially as its not an outfit soldier NPCs are wearing, it seems more navy based)