The story is now online and does include a link for listening to the audio of the in studio performance. You can find it here.
The NPR: Blog of the Nation includes two follow up posts to the Studio 4a performance.
The first story focuses on a 10 year old mandolin player who called in to talk with Ronnie about the mandolin.
The second story, actually the first one posted, includes a video of Del’s in studio performance of 1952 Vincent Black Lightning. It’s wonderfully filmed footage and worth watching for all Del Heads.