For you fiddlers I found a great site of fiddle tunes on MP3. All free to download.
http://www.fiddle.net/fiddle-l-anthology/
There appears to be a mixture tunes. I haven’t listened to them yet.
[Edited] OK. It appears to be more US “mountain music” then Irish and some of the stuff is less then great. However it’s still a bunch of fiddle tunes if that counts.