Classic Era Robe of the Lost Circle
 

Sorry if this has been previously asked, but does anyone have a good website that outlines the classic era Robe of the Lost Circle quest? I have completed the Purple Headband and Red Sash quests, but now I am stuck as to what's next. All sites I've found thus far either talk about the Epic quest or killing Bro Z.

Any help and guidance is greatly appreciated!

It's not in the game yet.

edit: sorry I forgot this isn't just a green forum - if you're on green, it's not in the game yet!