I think... its the belt. The rings and center piece of the lower robe seem to come from the belt from what I can tell. So... I don't think the lower robes are off. I think the belt is going to be that supe rare item that will be found in future packs or drops.
Did you not read my full post?
Now before you start saying how it is part of the belt or something let's look further, In both KOTOR and SWTOR versions of Revan's suit the skirt is black with a single red stripe in the middle, however the cartel one has 2 gray stripes instead.