Do they have the new body Escalade yet at this location and what category does it fall under for online reservations ?

A newer Escalade would come in from another location. It would a luxury class large SUV. We do have the new Suburban and Tahoe which are classified as extended and large SUV respectively. You may want to try 215Exotic Rentals. I've seen they have a couple of the new Escalades.

PHL itself doesn't have them, but one may come in from another location.