I've now heard back from these folks and am given to understand that the dots (link posted above) are neither right nor done with their permission. It doesn't sound like they mind the song being circulated as long as you ask nicely. (and I suspect that if you are going to make some money off it, they would want a cut).
It is a really fine song, and I would like to know a bit about how it came to be. If I find out more, I'll post it, or perhaps some of these folks will come and talk to us here.
Blessings,
Barbara