Yeah I don't know exactly when it was added, but I was a tailor at the time and I remember when they added it, and making a killing off of Wu's the first week it was released, when suddenly ALL the monks on the server wanted full sets of it.
[You must be logged in to view images. Log in or Register.] So yes, definitely wasn't classic
(actually I can confirm it was pre-Luclin, as I remember selling it in the EC tunnel rather than the bazaar)