Here's a page with some info on the song which points to a .zip file of MIDIs that contains it. It's actually made for mandolin and might not be the version you're looking for. You can check out the notation of the MIDI file by opening it in MidiNotate. If you don't have an unzipping utility you can get a free one here.

It's nice to know there are young people into great music like this. I'll still try to get you the actual Leadbelly chords.

PA