Has anyone ever tried to create a retractable cover for goods in the back of a vanagon/wesfalia?

I am refering to something that would attach to the back door and could be pulled to hooks in the back of the seats.
And could just as easily retract back.
Basically putting a vertical windowshade into a horizontal postition would do the trick.
I have a blanket right now that i throw over my area, but i was wondering if anyone has developed a more
permanent solution like i had thought of.
IT WOULD BE VERY SIMILAR TO WHAT A CONVERTIBLE USES TO HIDE THE FOLDED DOWN ROOF.
This would be something to prevent curious people from looking at your stuff.

Thanks to the list,
Riley Kettner

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