Rancho 9000XL model number for 2012 Dodge 3500 Dually

So I found the correct model numbers but I find that Rancho doesn't sell or warranty the wireless controller anymore. I don't want to have to adjust the shocks like I did on my old Ram so I am looking at Firestone's self leveling system R4 Tech. It comes with airbags and rear Rancho 9000's that the system maintains. Had anyone out there ever tried this system with a heavy camper. I have an Eagle Cap 1165 being built that I will be carrying.