How do I locate the strangers that have interesting boxes of letters in the attic, and how do I get them to lend them to me?

We have "interesting boxes" of live recordings from folk music performers that date back through 1972. They were professionally recorded in a great big old synagogue in Rockford,IL. It was a well known folk club for 30 years, somewhat like NYC's The Bottom Line. Some of these performers have passed on into folkmusic heaven, and have left behind legendary songs and stories, and live concerts that are up for the research about America, and American artistry!
visit: http://www.snapshotmusic.com