Ken, I'd love to see the Gogama Whore if you are successful in your search.
We gleaned much of our materials from the debris of our own misspent youths. We also did scholarly research in Mudcat's Digital Tradition, and the hallowed halls of the US Library of Congress. I reconstructed one verse of Barnacle Bill from scraps loaned by a sailor friend.
The concert was recorded, so we will know in the fullness of time if the sound is good enough to release. Outside if that, I know there are many rude song recordings out there. I would start with the discography of Mr, Oscar Brand.