The APR GTC 200 does seem to be the most likely popular choice. That's what I'd buy IF I didn't come across a good deal EXCEPT I think I'm going with the Kognition wing. That being said, take a think at doing something Kognition style. That is, not mounting to the decklid itself but to body structure.

The obvious is the way they do it, with slots required in the middle of the decklid. I wonder aloud if it'd be possible to make them such that they mount to the perimeter of the trunk opening, partially using the shutline for clearance with the need for a small notch in the decklid as well. This would eliminate all the warped decklids and/or bracing required. That'd be a unique product.

 

I would not buy a wing that Clark mentioned. I think many crs that do trend occasionally drive it in the street and would have gotten a konington if they wanted that style

You are talking about a complete redesign of a wing where the op seems to only want to modify some stands only