So according to everything I can find, Xur’ios is supposed to be to the left of the bank in Dalaran - but I’ve been checking off and on for a week and he’s not there. I’ve run all over Dalaran and can’t find him. I just need the pattern for the mecha-bond so I can make it for my hunter.
Well here is his wowhead page
Don’t forget there are two Dalaran locations in game now Northrend and Broken Isle if not at one check the other. Mages should have portals to both locations.