I just checked out powertab, no hits and
guitarpro. It has three cooder tunes but not what you are after. You might find some tampa there. Try these two forums.
http://www.guitarseminars.com/cgi-bi...Forum&number=1
Acoustic Guitar Forum
and
http://www.bigroadblues.com/cgi/dcforum/dcboard.cgi
Big Road Blues Discussion Forum
good luck