The satellite radio company is playing the audio of full episodes (minus music performances) on Channel 105 all through October. There are also interviews a
with comedians about the show:

https://www.prnewswire.com/news-releases/siriusxm-to-launch-the-johnny-carson-channel-in-october-300926174.html

I've been enjoying listening to this during the drive to and from work. I wish that it was a permanent channel.