The one you sold, no. Its however a rare world drop if you are lucky. I saw it on the GTN a few times. Rather expensive tough.
Its not, Saber Marshall's robe come only from one source, the Revanite Quest line.
There is a few version of that chest in-game:
- PvP vendor 1-49, White with blue i think.
- Crafted by Synthweaver, Black with an orange stripe on the head.
- Purple world drop pre-15 (same as the one in the Cartel Market), White with an orange stripe on the head.