Over the years, Zorn has been a contributor on Ashley Hutchings's albums "The Guv'nor vol 1" and "Sway With Me", The Albion Band's album "1990", Glenn Yarbrough's albums "Chantyman" and "Day the Tall Ships Came", as well as The Limeliters's album "Until We Get It Right", The New Christy Minstrels's compilation "A Retrospective 1962-1970", and The Kingston Trio's album "Born at the Right Time".