From what I have been told and from what my experience has been, you will only find these things through liquidation and closeouts. Unless you don't care if they're fake than there are about a million Chinses trade places that will sell you the moon and the stars.
Oh! and another thing. be careful when listing designer items on Ebay. I have been suspended twice for listing designer items. Make sure you are EXPLICIT as to its origin and/or authenticity or you'll be left standing on the sidelines.