Try:
“Kokoro” and “Pain” from Xenosaga (game) soundtrack. Davy Spillane plays low whistle and uilleann pipes. Instrumental only versions available.
(posted earlier already)
“Small Two Of Pieces” and “Stars of Tears” from Xenogears (game) soundtrack. Spillane plays only the low whistle.
Would also recommend “Creid - Yasunori Mitsuda & Millenial Fair” (can be found at game music sites, etc. Try http://www.gamemusic.com or ebaycloud.tripod.com - cheaper!).
Spillane plays low whistle and pipes here. Maire Breatnach plays fiddle.