I searched and found the music in better quality(still room for improvement).
It is a package which is called "Ultimate Lineage II OST Compilation". You can download it via torrent or Megaupload. It contains music from "Gracia" and others.
You can either download "Ultimate Lineage II OST Compilation" here
http://community.livejournal.com/fantasy_music/10468.html
or download "Gracia" track by track here
http://originalsoundtrack.ru/songs/2973
Thanks !
anyway, anyhow! thx