snipmp3.com will allow you to extract an mp3 from the youtube videos. Don't know if thats sufficient for you needs though, and its probably not legal.
These are the same clips I linked to in my post. This is the music, however. If only we had the whole Grieg, for instance. Or that Totentanz on CD. It's on YouTube... it must exist in someone's archive.
as for why someone would not be all that interested? i can understand it. at least for me. i'm not all that super crazy about the liszt work and the grieg, well there are so many great recordings out there, i have a hard time find a reason to dislike so many of them becuase a really good one is out there....