Nice find. Never seen it before. Wish they put the title block upright and smaller. Woulda been even better.
I would think it's a promo and not commercial. Mainly, because it's two pieces. Not a lot of "piece" material in the commercial market.
Honestly, it seems like something you'd see in a record store than a theater. They were still using promotional door panel stuff in record stores back then. Even though it was becoming less an less.
Hilarious movie...still. "Chips, dips chains and whips"
Sadly, a remake is in the works.