The version of Leadbelly's Duncan and Brady is on the Smisonian Folkways album "Where Did You Sleep Last Night"--Leadbelly legacy vol 1. It is done once with guitar and again a capella.

According to the liner notes you can find information about the song from:

Moses Ash and Allan Lomax, "The Leadbelly Song Book"--Oak publications 1962 (Anyone know if it was ever reissued?)

and

Carl Sandburg, The American Songbook--Harcourt, Brace and Co. 1927. I know there is a reissue of that one with an introduction by Garrison Keillor because I have a copy.

The Sandburg book, however, doesn't give any information about its history, it just tells how he got the song.

By the way. The Leadbelly version says "shinin' star" instead of "'lectric car".

Murray