I don't know the song, but my sister's boyfriend is an excellent guitarist and (better) bluegrass mandolin player, with a better than decent voice. I'll see if he would be interested.

Here he is playing "You are my sunshine": http://www.youtube.com/watch?v=w0cJzTgauCo and the St. Anne Reel on mandolin: http://www.youtube.com/watch?v=IWOZE...eature=channel (there, he auditioned for you)

Sarah