Window/Maxx® Rain Guards

Met a couple with a 2009 2350 on a sprinter chassis monday. They were here in town from Nova Scotia, and we sighted them at the Publix as we drove by. NO mistaking that spare tire on the back.    They had a window treatment I had never seen for the sliders - Window Maxx guards. I LOVE the look, and no clunky awning on the top. Anyone have any experience with these?

$53 here  - http://superdealsrvparts.com/window-maxx-window-vent%2C22-0368%2C31-1984%2C Might be better deals elsewhere. Though a commenter on Amazon (where they are UNAVAILABLE..) stated they were no longer made as of 2017..    Hope they are misinformed.

Called the link above after typing above -    Evidently NO LONGER AVAILABLE. 

 Anyone else have a similar product?  This is SO nice!

We just saw a rig with those a week or so ago. First time I'd seen them also. I was wondering how much drag they give while driving. The open side faces front so it looks like the wind will try to pull them right off. I didn't get a close look so maybe the front is partially closed. As for your answer, no clue about other sales but will watch for them on rigs and try to talk to owners. We shall become part of your network of spies! Cool RV toys for all!