I have just discovered some wonderful free notation/tabs for two Celtic Solo Guitar Collections.
Here are the links: 1) Ramble to Cashel.
http://www.guitarvideos.com/assets/pdf/13029dvd.pdf
2) The Blarney Pilgrim.
http://www.guitarvideos.com/assets/pdf/13063dvd.pdf
Hope these are helpful to guitarists looking for solo Celtic guitar arrangements.
Many thanks to the Stefan Grossman workshop series!
Trevor