I am in need of a 57 Plymouth Search tune (7 button) radio. It seems when I went to hook up my HighWay Hi Fi I do not have a receptacle on the side of my current radio's chassis. O.. There is the location and the hole but no female receptacle. In fact I doubt the radio ever had one since no tell tales for the rivets that holds it in are evident. Therefore I am wondering if it was discontinue later in the year. Seems I've been told the HI Fi was a factory installed feature only in 56 with dealer inventory sales only in 57. Perhaps it was deleted after a time when it was anticipated that the inventory would be sold out. So does anyone have a serviceable Plymouth radio for sale? Thanks for any help or referrals. Marv [Non-text portions of this message have been removed]