Does it have to be an air boss? I dont know if it has the stretch thing in the back place it on top of another rolling bag. If you are open to it you can do this bag on the bottom:
http://www.briggs-riley.com/category...X&sec=business
And this one on top:
http://www.amazon.com/gp/aw/d/B000ET...dir_mdp_mobile

Good luck