There's a guy at the Charlotte AutoFair and will probably be at GoodGuys this weekend who has an antique car/truck radio business. He's got several for sale and they look like new, most of his radios run in the $300-$500 range. I think he converts them over to AM/FM... turn on once for AM, turn off and turn back on for FM. I can get information for you tomorrow if you want when I go to GoodGuys.
Lee
