In addition to the front and side air bags, the Bentley has an overhead airbag as deployable rollover protection. Any idea if the rules would accomodate that? I'm guessing not.
Worse case scenario, Bentley has a bespoke roll cage and seat-mounting bracket made from T45 with heavy density padding, covered in rhino hide with hand stitching. The custom race seat has additional bolster travel but at the expense of deleting the A/C and massage features. And the rear mounting points require de-activating the surround speakers in the rear and blocks the rear passenger reading lights. I realize that it takes sacrifice, but I'm not sure that it would be worth it.