Thanks for those links. I will see about the upper part ("sail panel") next, but I think I won't have much at the sides because it would interfere with access to the ramboxes.
Now that I've gone the cheap route and figured out the sticking points, I may re-do it a bit nicer. Also may play with raising the front to get a bit of taper in the shape, although I can't do much with the tailgate of course. Might even try tailgate down with a sheet of plywood extending back and tilted up at front (and down at back).
The real problem is that, being retired, I don't drive much and this is the least-driven vehicle.
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