Mary McCaslin was Jim's partner, and although he passed away
she is very much alive and making music in and around Santa
Cruz California.
Mary's web site
and on her page is this site: http://www.rounder.com/rounder/catalog/bylabel/phil/1055/
but it seems to lead to some down load action...
if you go to http://www.rounder.com and search for jim ringer
you will see two albums listed:
Jim Ringer, The Band of Jesse James: The Best of Jim Ringer
When Jim Ringer sang, it was hard to believe he hadn't lived every line -- whether he was singing about prospecting for gold up in Alaska or falling in love along the San Joaquin. Known for his solo albums and for his recordings and performances with Mary McCaslin, Jim helped define folk music in the 1970s. Jim Ringer lived hard but he sang gently -- and after all these years he still has me convinced. --Steve Netsky --with links to sound files included...

and this one: The Bramble & the Rose
This late-'70s recording was the only duet album by musical partners Mary McCaslin and Jim Ringer. On many tracks, they're accompanied by a full band, including, among others, fiddler Jay Ungar. Tunes include "Geronimo's Cadillac," "Hit the Road, Jack," "Rank Strangers" and others. Mary McCaslin and Jim Ringer were an unlikely combination in any number of ways. But somehow, through their years of touring and through this recording, they managed to set the standard for contemporary male/female folk duos. Together, their voices -- Mary's high and lilting, Jim's darker and rougher -- covered the wide terrain of American folk song in a thoroughly compelling way. The Bramble and the Rose stands as a fitting testament to their unique partnership.

-----> the Bramble and the Rose is one of the most beautiful
       love songs in existance. It contains the classis image
         two twining vines as seen in many Child Ballads and
          often seen to rise from the graves of lovers....
Mary appeared in Chico a year ago last December, with local band
Hawks and Eagles opening for her.