I had to jump in on this one!
I have been listening to these old radio shows for some time now as a way to pass the time on the long drives.
I get them from the website Old Time Radio Fan
A friend of mine is a radio broadcaster and he gave me the info for the site.
Most of the old ones are available as free mp3 downloads and are easily loaded into a mp3 player and I use an adapter to play over my car or rv system. While listening to "Johnny Dollar" I can easily pass a hundred miles and still be alert.
Thought I could share something with you!