Blizzard has the whole soundtrack available for download (including one four songs that didn’t end up in the game):

D2:

http://classic.battle.net/supersecrest/tristram.mp3

http://classic.battle.net/supersecrest/wilderness.mp3

http://classic.battle.net/supersecrest/sisters.mp3

http://classic.battle.net/supersecrest/rogue.mp3

http://classic.battle.net/supersecrest/spider.mp3

http://classic.battle.net/supersecrest/jungle.mp3

http://classic.battle.net/supersecrest/zakarum.mp3

http://classic.battle.net/supersecrest/desert.mp3

http://classic.battle.net/supersecrest/toru.mp3

http://classic.battle.net/supersecrest/sanctuary.mp3

http://classic.battle.net/supersecrest/crypt.mp3

http://classic.battle.net/supersecrest/tombs.mp3

http://classic.battle.net/supersecrest/monastery.mp3

http://classic.battle.net/supersecrest/cave.mp3

http://classic.battle.net/supersecrest/mesa.mp3

http://classic.battle.net/supersecrest/leoric.mp3

http://classic.battle.net/supersecrest/coda.mp3

http://classic.battle.net/supersecrest/rogerandme.mp3

http://classic.battle.net/supersecrest/maggot.mp3

http://classic.battle.net/supersecrest/docks.mp3

http://classic.battle.net/supersecrest/sewer.mp3

http://classic.battle.net/supersecrest/kurast.mp3

http://classic.battle.net/supersecrest/mephisto.mp3

http://classic.battle.net/supersecrest/outtake1.mp3

http://classic.battle.net/supersecrest/outtake2.mp3

http://classic.battle.net/supersecrest/outtake3.mp3

http://classic.battle.net/supersecrest/outtake4.mp3

http://classic.battle.net/supersecrest/temple.mp3

http://classic.battle.net/supersecrest/thecainrap.mp3

D2 LOD:

http://classic.battle.net/supersecrest/baal.mp3

http://classic.battle.net/supersecrest/fortress.mp3

http://classic.battle.net/supersecrest/halls.mp3

http://classic.battle.net/supersecrest/ancients.mp3

http://classic.battle.net/supersecrest/siege.mp3

http://classic.battle.net/supersecrest/icecaves.mp3