I was lookin through the video clips on the GTX1 web site and a came across a clip that had a few seconds with the car that I believe was the very first test mule. It's a great shot with car car going sideways through a corner ... The car is red and has gold BBS alloys.
Look at 1 min 40 sec: http://gtx1.com/beyondvideodsl.html
Look at 1 min 40 sec: http://gtx1.com/beyondvideodsl.html