Big Sciota and Billy in the Lowground are classics, fun to play and not too hard to learn: listen to both on Brian Sutton's cd of duets with other flat-picking greats Not Too Far From the Tree
 The tabs are not too hard to find - somewhere I got a tab of Sutton's first break ion Big Sciota which is fun to play, but I can no longer find it on line. I can send it to you if you are interested.