Chewbacca was played by Peter Mayhew, who donned the suit in all three classic Star Wars movies and would again wear the Wookiee wool for a number of notable television apperances. In 1978, Chewbacca returned to Kashyyyk to visit his family in the rarely-seen “Star Wars Holiday Special” television extravaganza. The heavily dated artifact of the late ’70s has only aired once, and is unlikely to ever surface again. (emphasis added)
“Unlikely” is profound understatement, assuming you go through official channels.
That Lucasfilm will not let you see or sell you a copy of the thing should tell you something. They apparently have the stomach to sell you a Darth Vader Sprinkler and even Darth Vader Cheezits, but the Star Wars Christmas Special is practically an _unperson_ in the Star Wars Merchandising Cavalcade.
_Happy Life Day!_