We're thinking of doing this, too. We have looked at Carefree
, there may be other manufacturers also. Carefree are widely distributed, but they are not custom made and only drop 34 to 36", so they won't work as privacy shades, at least in our coach. AutoMotion (at least in their pictures) is not solid, the upper portion looks like mesh, so they won't work at night.
The best bet, at least in our case, seems to be MCD. They are custom fit and Cruzer
has a great writeup on his website on his installation. AFChap mentioned in this post
that his windshield was curved enough to require 3 overlapping shades!
There are several threads outlining problems with other brands of visors/shades, but none with MCD. As a matter of fact, they all were replaced with MCD's.
I think I'll make a pole like the one shown in cruzer's web page and to try to fit ours, as MCD is not going to be at rally near us on the East Coast and we aren't going to make it to Texas anytime soon.