It was on NPR? Really? Would you happen to remember what program it was on? I'd like to know.
The story is in Fish Whistle, which you can download as an e-book from Amazon, also Fishwhistle, which you can find used all over, and Hoboken Fish and Chicago Whistle, which you can order as a book on Amazon, or from Xlibris. And I know an audio version exists, but I don't remember where.
Bobby Gibbs used to tell people I had worked as a roustabout in his circus, and played trombone in the band--which is true, of course.