Suzy,

The New Lost City Ramblers were on Pete Seeger's t.v. show "The Rainbow Quest." The series ran in the 1960's. I have an old vhs copy of the show. The information given on the box is Advertisers' Broadcasting Co.
Rainbow Quest Trust, Central Sun Video, Box 3135, Reston, VA 22091. The number on the box said #A 110.

Hope this helps.

Dan