I don't know for sure since I purchased the car from an estate after the owner passed away. Someone from the forum sent me the link which matches Ron's info above.
"I am looking for the rear deck lid louvers that were sold by Panteramarica in the late 70's through their accessory catalogue. These louvers were manufactured by Chastain Louvers, Inc under the Trade marked name Chastain Onepiece. This company is now defunct. These louvers were attached by 4 mounting screws and had a urethane foam that protected the paint from the aluminum louvers."
John