Here's where you can listen to it. I don't know how long it will be available and I couldn't find a link about how to find out whether the show is available on your local station.
Milt Gross, “De Smot Billy-Gut,” read by Isaiah Sheffer
From: Dunk Esk!! (Grossett and Dunlap) (out of print)
Dalton Trumbo, “To William Hunt, the Franklin Hotel, Rochester, Minnesota” read by James Naughton
Collected in: Additional Dialogue: Letters of Dalton Trumbo 1942-1962, edited by Helen Manfull (M. Evans and Company, Inc.)
Jorge Luis Borges, “Dreamtigers,” translated from the Spanish by Andrew Hurley, read by Isaiah Sheffer
From: Collected Fictions (Penguin)