Pac-3 was based at 7106 Greenfield in Dearborn and was owned by Richard Becker. There were two studios, the first of which was opened in 1967. Richard let me see it in 2001. It was very small and appeared to be used as a store. There was only one Pac-3 address and that was at Greenfield.
Regards Echoic, Ron Murphy gave me some old documents which showed Albert Leigh as “Salesman”. I am sure he was also the owner.