I'd be interested in the answer too...

The rear passenger side door lock on my 3500 stopped working via either key fob or the electric lock/unlock switches.
I saw the various ones listed on the aftermarket, but I couldn't find any part number on the Dodge direct sites.
They seemed to list other stuff in the door, just not that...although I can still see them on their parts list "images".
But then none of the sites "I checked" break out the part numbers for discontinued parts anymore.