Okay got the bus('71 dormobile) and want to use it for weekends away.The problem is that the bellows on the pop up is plastic and in the summer(when we get one) the morning sun comes streaming through (not a problem for me and the wife) and wakes up our 6 year olds (major problem as once awake all awake).I am going to replace the bellows with a canvas one but would like to know how dark they keep the roof space and also can you get black out linings for the bellows area.If not I suppose it would be possible to get a one off set made.Any thoughts????