via the comments section
MPBN has posted the audio of the GPN set at the Skowhegan Opera House in its entirety (with a couple of photos courtesy of Maine fan Alan Holbrook) on this page:
Per MPBN’s agreement with GPN’s management, this audio is available only in Streaming Audio format (NOTE: Windows Media Player required) and will remain on MPBN’s web site for 30 days. We will take down the audio on July 30, but until then you can listen as many times as you wish, free of charge.
I’d like to go on record and thank the kind folks at MPBN for broadcasting this live.