Rex... with a beard :D Rex is one of my all-time favourite characters from the Clone Wars series. I wonder if he still has his helmet with the Jaig...
IA13 is your best bet.
Link the best I can do at the mo. https://www.facebook.com/starwarsrebels/videos/443765265780102/
Oh. My. Deity. I. Don't. Believe. In. Just saw the trailer for Season 2 of Rebels.... Rex! A-Wings! Vader!