I have a 5th wheel hitch in my pickup for a camper. Can you buy a Gooseneck hitch that would attach to the current rails that are in the pickup bed for the 5th wheel? Or is there a converter that you can purchase that would convert the gooseneck on the horse trailer to a 5th wheel, that we could pull with our current 5th wheel hitch? Why don't they make them universal? Any advice much appreciated.