Had mine done at the truck alignment shop where I get tires and alignments too. I know the shop guys are good and the owner is fair.
At 36K miles replaced rear disks, calipers, hoses (there had been an intermittent caliper dragging problem). Front just need pads, no work on disks. Flushed fluid and replaced hoses at the calipers. Don't remember what I paid.
My Ford dealer does big truck work, but is harder to schedule (only one truck bay) and technician is luck of the draw. They send a lot of their suspension and brake work to the shop I used, anyway. Cut out the middleman.
E-450 cutaway is not so much a van chassis as a light-medium truck chassis with a van cab installed. Ford might even sell more as bare rails, than they do with the cab, for step van applications.
Tom Test
Itasca Spirit 29B