Hey hybrid john,
I live in the Metro Detroit area and as you may know this place is the 'Motor City'.
Surprisingly enough, there are alot of talented designers and engineers here (they just have their hands tied way too much by bean counters and such). I have sold quite a few New VW's to designers and engineers here. A few have become really close friends, one of which did that sketch for me. He is working on a few more for me as we speak of the front and the rear. My/his inspiration was from the Renault Alpine 110 (For those too immersed in the VW culture to see the rest of the world, this car looks - in my opinion - alot like my Ghia in style and lines.) which has been raced and there are alot of spoiler and rear lip/wing piccies out there.
I started a thread about the Ghia's lack of downforce (actually too much lift) and spoke about needing a ft spoiler to help tame the 170lbs of lift in front and 70lbs of lift in the rear (@100mph). I was showing my friend Mitch this site and he started lurking here, read my post and said "hey stupid, I'll make some sketches for you as long as you promise to spell my name right!) So...Auerbach is the designer
If you want to see the big picture
send me a message and I'll forward the file to you. I tried to post in in this section but it's too large.
Enjoy.