I did some checking myself, Grandmary, and I can't find it. However, if you read music, you can find the melodies for O'Carolan's work in "O'Neill's Music of Ireland." (At one time that was online for free.) If not, then Amazon is selling Sylvia Woods' harp book with works of O'Carolan. That book has melody, bass part and chords.

Another source for you might be contemplator.com, which has MIDI's and a few gif files of O'Carolan's work. It would be handy to have MIDI software on your computer to get the most music from that (and other) music sites.