The entire score of FOR A FEW DOLLARS MORE is available on a cd titled "The Great Western Soundtracks Vol. 1" which has excellent stereo fidelity. It's a BMG cd and not very expensive.
ALL the music on this cd is by Morricone.
It includes key tracks from the other Morricone/Leone films plus lots and lots of other great Morricone. This is the best Morricone all SW compilation available.