The last driver was the owner of the company (using it temporarily until Russ took possession). They did put in a new mattress. Thanks for the information. Everything I looked at online has one of the two configurations you describe, but he has neither.
I posted this last year when I had a 2018 Volvo. You can get a 3 drawer plastic portable stand that has a flat surface. Fits nicely between the seats. Doubles as an arm rest when you don't have a standard shifter to hold. I just turn sideways and do my paperwork on it at the end of the day. The drawers are huge and you can load them with anything you need. I kept office supplies in one, snacks in another and breakdown stuff in the last. You can take it in and out of the truck really easy. $10 bucks at Wally World. Leave the wheels off....lol.
