Don't know what the prices are or what your willing to pay, but I've just seen a post on Facebook, which you might be interested in.
Bill mcbride has just got a DT Vader and a DT Ben he's authenticated for someone who wants to sell, the Vader is missing the inner tip, but the Ben has the complete and perfect inner tip, but the outer saber is broken in half!!! Sounds perfect for you! So contact Bill!