Cassius Fett I think you mean. Yes, his armor is mentioned.
Grand Admiral of the Imperial Remnant.
"This one is constantly thinking, analyzing, strategizing. He showed no fear, but was curious, studying me in turn."
"All thoughts are worth listening to, whether later judged to be of value or not."
"I have no qualms about accepting a useful idea merely because it wasn't my own."
"Butů it was so artistically done."
―Thrawn's last words