After a lot of research and listening to scratchy records, I feel that I have found a lot of the 'unknown' music Shep used in the 1963 and later years. It is an album put out by the Waldorf Record Corp in Harrison, NJ called "50 Great Moments in Music." I have identified 9 tracks he used on his shows and as I listen to more shows that number may increase. Shep would have qickly noted that although the album is 50 Great Moments. . ., there are 51 tracks!
John writes in his blog:
This year I will do you all a favor and forego trying to ape Shepherd and simply let you hear the master tell the tale in his own words, in his own inimitable style. It's a classic.