1998 TV Documentary on Same Subject
It is called "Dead Men Don't Tour: Rodriguez in South Africa" It aired on South African TV back in '98. Which makes is all the more amazing that everyone was shocked by the "revelation" that was the subject of "Searching for Sugar Man."
The whole story was told 14 years earlier!
Granted, the "Searching" doc is more complete and more compelling. BUT the TV doc has a LOT more concert footage.
Check it out on the SugarMan.org Youtube channel.