Which rear spacers are compatable with Air Lift 1000 air bags?

I'm thinking of adding a leveling kit to my 2014 Ram 1500 sport. I will also be adding a 1.5" spacer to the rear, since I'm often hauling stuff with the truck, and hate the sagged out look.

Any of the rear lift spacers I've seen so far, say they are not compatible with rear air bags.

Are there any spacers that that can be used with rear air bags? Or has anyone modified the spacers and bags to make it work?

Thanks for any insight,

Carl