Here is a glitch of epic proportions, how to get a few Republic items as Empire!
Now this only works with very few items unfortunately and few classes will find this useful but it is still Republic items as the Empire, unleash your inner defector...Or get your trophies here.
Go to Benna Lodd on the Imperial fleet, she is a Heavy armor pvp vendor.
Bioware accidentally gave her Republic earpieces and implants.
I have confirmed that the Republic have no Imperial items, and I was unable to find more republic items..The same vendor also possesses the Imperial edition of said accessories.
Enjoy!