Actually, some still do and many of the older files are AutoCAD. The chassis designer I know still uses AutoCAD for some work (FF, FC chassis). He started off using Paper 1.0.
This car was done in autoCAD
http://www.witnessracing.com/ff124.html
This one was done in Paper 1.0
http://www.chrismore.com/graphics/ff_homepage_body.jpg
The guy at dpcars.net has an Ecad file of this track toy. I wouldn't recommend copying his geometry but you can get a very good look at what he has done.
Perhaps a good question is what do you want to do with the drawings?