lance camper porpoising and tires cupping

Does anyone beside Lance offer the attachments for the cab over? I have never seen them, but it would seem other campers would have the same issues and benefit from the same fittings. I have only talked to a couple of folks who have used them and they did not seem to harm the truck in any way I could see.

I have never used them and know nothing about them other than what I have stated above.