Have you found out yet how to obtain these? I'm also looking for the same mods and can't find them anywhere. I got 2 from quests tho but thats it.
The only thing I did find so far are Social Item Vendors on Alderaan that should sell them, but when I check 1 out he only sells a roleplaying armorset and a mount...
Melos is the vendor on Imp side, Leria the one on Rep.