I have also been searching for a 5th Hitch for my 2013 Ram 2500 Crew / 6.5 Bed. My dealer has been modifying the vehicle an making hitches work, but when I called Ram they advised that any modification would void the Structural Warranty so I make weekly calls to all manufacturers.
Today 6-26-2013 PullRight advised that they now have a no drill installation plate for the slide right hitch. Estimate $1500 for entire kit with install of the 15K system. I have ordered them so just in case do not hold your breath.