Actually, any old AM/FM working vintage period correct-ish Blaupunkt or Becker could work. Vintage Frankfurts and Beckers command good money. Perhaps a not-so-in-demand vintage radio will do. Working a plus, but I'm OK just filling the hole/space. $0-$250. Non working Frankfurt goes for $300 ish and working radios are $700 or more!
There are lots of retrosound options
I have a working Blaupunkt frankfurt serie Z radio available.