Thanks to all, after saving and analyzing the installation photos, I've decided to make my own. $250 to $300 is bloody ridiculous for $35 worth of colored Lucite or $65 of Lexan (polycarbonate). I have a neat little machine shop I take care of and will let you know.
The $85 unit I posted is much too blah in workmanship.
Mounted from the umbrella hooks with 3.5mm screws seem a bit cheesy and takes up very valuable space for my seat back.
The pretty curved/etched one doesn't, as golfergal points out, cover enough of the rear to be truly effective.
I like the idea of mounting it forward of the roll bars, but Velcro is a little tacky too...might be the only way though.

Question: Clear, smoke, bronze or red to match? The red I think is probably too bright.