Maybe I got it wrong, but I think that british high rank officers during WWI were the last to use chainmaille.

I like the idea that very high rank officers (Grand Moff, for instance) have a gala uniform based on the stormtrooper armour. Pretty much like the ¿classical? image of Obi Wan in both Clone War cartoons. While changing only one guy's costume is easier that altering every extra's; this character has lines, and don't know how Ady could approach (if he tries to) to mantain the character.