Back in the day when I ran a bikini top, I wanted a rear bed cover that would fit over my soft top hardware and taper up to the top of the roll bar under the bikini top. I figured you could make the more vertical section out of boat top window material but it would keep things protected underneath. When it would warm up during the day, you could drop the vertical portion and in the evening when it got cold, you could put it back up. My idea wouldn't allow any passengers in the back.