Quartette did record Hard Times, and here is info on the CD which contains it with wav/RA sound files of the song.

http://www.interlog.com/~quartett/product.htm

The members of Quartette are Cindy Church, Caitlin Hanford, Gwen Swick, and Sylvia Tyson. Swick joined the group after the death of Colleen Peterson in 1996. You will find information about the group at this site.

http://www.nucleus.com/~cowboy/quartette.html

For those who are curious~~yes, it is that Sylvia Tyson.