There's a 2 CD/1 DVD set called
Madison Blues that was officially released. Has a few studio outtakes, but mostly it is live recordings from the
Kiln House era. And, the DVD is a fairly recent 96 minute interview with Jeremy Spencer.
Here's the link to the album at Amazon.com:
Fleetwood Mac - Madison Blues
And, I'll start emailing you tracks from those '72 shows in the next couple of days...got sidetracked by visiting relatives.