Tubidy .
If the music is from a CD, you can probably find them online (if the group is famous enough).
Also, the problem with downloading from YouTube is the quality of the downloads.
Optimally, you should have a music file that is 328kbps. Most YouTube downloaders only go 'till 128...
Anyways, your only possibility's are Google & YouTube if ThePirateBay doesn't have them.
how about dilandau.com it is better for me
www.youtube-mp3.org
This is good.
Spotify