Vandros of the Nightborne. There is an elf who knows how to dress. Ever since he was a young noble in the Court of Farondis, Vandros has been known for snappy, fashion forward outfits.
I've never been able to see his garments up close but my research tells me that his tailor's technique is not so much in the fabric as it is in the thread. It appears to be spun of the very shadows themselves.
You have your methods to obtain it, I'm sure. Get his robes and get the thread.