Windsor runs the Altadorian Trove, a shop in the Bazaar district of Altador that stocks many rare treasures.
Here, we are, literally, your one stop shop. So find it, buy it - it's here for you!
Take a look around. What you want is here -- not across the street, not in some other curio shop -- no, it's here.
I guarantee you that you will be walking out of here with something.
Just take a look around and be amazed.