I always wondered if that outfit existed and what pieces I had to collect to get it. Any help would be greatly appreciated.

This is the outfit in question.

http://www.worldofwarcraft.com/downloads/wallpapers/wallpaper46.html

I've never played a female toon, and some armors look very different on the different genders, but this looks like a "set", and as such I have never seen it in game or on thott.

Okay. I have found the other disc cover Armors, with the undead starting with it.