Blind Willie McTell's version can be downloaded mp3 at amazon,com, http://www.amazon.com/Climbing-High-Mountains-Trying-Home/dp/B000QN7XTW
Album "Blind Willie McTell and the Regal Country Blues."
Also youtube- Climbing High Mountains, Tryin' to Get Home:
http://www.youtube.com/watch?v=cYILQPpmIJrc