John, sorry I missed your response, but thanks for your answer! As best as I can find it was produced by "White Tree Arizona" but that could be false. Thanks for the FilkCast link, I'll have to look into it.

I did just find this link which allows you to listen to the title song Silver John, and the Nine Yards of Other Cloth song linked by Starship.

It also has a pretty detailed writeup about the song from Bethancourt.

A version of Bethancourt's website, for anyone interested in the singer, is still *sort of* running here, though many of the links no longer lead to the correct place