Hello there!
There are certain items available from the Tacticals and Set Bonuses vendors in the Supply Area of the fleet which sell items with a unique appearance that can only be used by a specific class; such as the despoiler helmet only being used by agents.
However, there are much older; visually identical, versions of this armour which much older players can use on any class that they desire.
I think that a great deal of players, especially RPers, would greatly appreciate it if you made it so that the Outfit Creator allowed us to use the cosmetic appearance of those items even if we still can't equip them for the stat bonuses.
Alternatively, including them in new Cartel Market sets so that these items are available for the people who want to use them on characters of a different class.
Thank you