Guest Frank, I've just had a listen to the CD Masato suggested (thanks for the heads-up Masato!) and it sounds like it's exactly what you're looking for - good clear playing, nothing extraneous - and is amazingly cheap. I notice that Amazon only has one left in stock though they say they can get more (I'll order it another time...)

There are a couple of other Welsh tracks on it too, and an alternative title for the Lamb's-Fold Hollow is "Let Now The Harp" if that's any use to you - not sure what your project entails.

Best of luck, Bonnie