Most bag system for trucks are made for raising the height, but they can also be set up to lower one.

Found these guys as a sample of whats out there

https://www.cjcoffroad.com/products...HcMkxkKlSm03YF-DhaEeluwEijrIEgWvNzF1wiUE

Also might check out this forum

https://www.ramforum.com/threads/adding-air-bags-to-ram-2500.184308/

My Monster are real!

Living within your means makes life pretty easy.