Once you've signed up on dimeadozen.org, do a
search for 'lightfoot', and you'll see they currently have torrents for 4 different Lightfoot concerts.
Besides the two recent concerts listed above, they have a
1977 concert, and a
1987 Folk fest appearance. Both performances took place in New York, and both were taken from a radio broadcast.
I am currently 'seeding' both of the NY concerts, and I'll keep doing so as long as I can. Still downloading the 2005 concerts.