flex air or trail air air ride pin box

I know it's not what you looking for but it is air ride and what I bought. I went this route cause if I trade in the toyhauler for another it stays with the truck and the air ride pin box's don't interchange with all frames. what a diff the air ride made in towing. the chucking is gone and smooooth!

http://mountainmaster.net/hitches/airhitchcom.html

I think this one would be better
http://airsafehitch.com/5th-wheel/20k-omni-directional

or even this one
http://airsafehitch.com/