I just got a new van for work about four months ago, Ford E350 with metal divider and plastic shelves. They have the normal metal sides but plastic shelves with two aluminum bars under them for strength, they are speced at 200 lbs per shelf. There is almost no rattle from them and now I can finally keep the radio at a normal level. It also helps if you have to make a phone call from the road, don't have to deal with all the background noise asking people to repeat themselves. Not sure who makes them but they came from the dealer with the truck.
