Here's a great site with access to all things old and electronic. They have vintage and after market tubes and even authentic Tweed suitcase coverings for your old Fender amps. Radio kits too!
We had a Zenith up on Lake of the Woods Ontario and it was on that thing that I first heard Little Stevie Wonder play "Fingertips" on WLS in Chicago. Ya man. The old radios had good songs that came out of them.