I can’t seem to be able to find any of such. Maybe I just don’t know the proper keyword?
The premise is like this: pickup trucks are good because they separate cargo from people. The open space allows tall stuffs to be carried. But when it rains, things can get nasty. Then why don’t we add a retractable roof over the bed? It doesn’t have to be too high, just around the cabin height is OK enough. But that’s more than twice of the typical covers. It can be stacked deep down the space between the cabin and the bed, that way it won’t block the middle rear mirror when retracted. When it rains, with a press of a button, bars will first go up and then spread towards the tail end of the truck. Similar to those convertibles, but this time it’s easier because the roof doesn’t have to go against the wind.
With that train of thought in mind, I haven’t yet found a big enough drawback for people to not use such feature. Yet if no companies are manufacturing the design, there must be a reason(s). What is it?