They will be different for each generation of Econoline. (There were 4)
I had a third gen E 150 (and a very stock 2nd gen) that had a step bolted to the bumper. Then had a ladder up the right side and a roof rack on the top.
The bolt on step broke and I never could find the exact replacement. That step had a built in LED light and a license plate bracket. Mostly because the add on spare tire covered the stock rear license plate location.
I towed a very large boat. Adding a step bumper in the rear would have been an issue for me to be able to tow. And I think there are step bumpers out there.