In my quest to have a transmog outfit for every toon, I developed one around the no longer available Azure Watch Robes mainly because… well any mog involving them would be mighty rare. And I seem to specialize in mogs involving pieces that are no longer available in game.
Here’s my priest:
Helm: Sea King’s Crown – available in Borean from the Murloc people for 30 clams
Shoulders: Mistyreed Shoulders
Robe: Azure Watch Robes
Gloves: Mistyreed Gloves
Belt: Sage’s Sash
Weapon: Kri’tak, Imperial Scepter of the Swarm
Offhand: Shomi’s Fan
Cloak is disabled and Pants, Bracers and Boots don’t show on this toon so I didn’t bother to find matching ones. For having basically no gold on this server, I think I did alright 🙂
You Yank It, You Tank it: Blog of a Tanking Death Knight Lady 
I love that dress, what a shame its not available :(. The whole outfit looks really pretty.
That outfit does look lovely! Ah, all these things you can’t get anymore!