Want To Buy: Beretta 680 Series 410 Barrel From Skeet Set

Looking for a 410 bore Beretta 680 series o/u barrel from a four barrel skeet set.
During the past two years, after a long and hard search, I've been able to turn my Beretta 680 12g into a three barrel skeet set with 28 inch 12, 20 and 28 gauge barrels, Now looking for the 410 to complete the set

 

Still looking.

 

Still Looking!! Must be a one out there somewhere.