Only one r(#7) remains unsolved.
The first clue was "This 'car', never built, was vaporware before that term was coined".
The second clue was "Though the story of this car is a sketchy one, our soon-to-be-most-prolific poster was able to fill us in"
From these clues, one could presume:
* The car was never built.
* The puzzle pic was a drawing
An adjustment to one clue - our most prolific points accumulator is now also the most prolific poster, do the AP member who posted the puzzle for #7 is now our third most prolific poster, but is less than 300 posts away from taking the #2 spot.
The proposed, but never-built car was based on mechanicals from one country, and was to feature clothes from another.