I don't have the correct plug. IIRC 69-72 A body radios had a different plug. not shared with Firebird or B bodies.
Here is another ebay source. You can contact him for what you are looking for.
https://www.ebay.com/itm/25543275836...wAAOSwf49iLQhj
You can also contact Scott Thelander. He may have the correct plug and is a member here.