People have different definitions of "cupping". Is this what you are referring to?
https://www.youtube.com/watch?v=XG2mmIcQRIAIf so I don't think air bags would help. Air bags are simply for load leveling when towing heavy loads.
Cupping is generally the result of an unbalanced or out of round tire that has been hopping along for some time causing uneven wear. You need to find what is causing the hopping and address that rather than a band aid approach. If the cupping is that bad then you'll likely need to replace the affected tires as they will never be round again.