Actually Art three of Exner's cars got built. The 1970s Stutz Bearcat II. http://darquewandere...set=72#/d261rqn
The Stutz revival car, while using much of the lines of the original Exner renderings, really isn't done exactly as Virgil Exner designed it though, due as much to its having been introduced several years after Virgil Exner Sr's death in the late 1960's (the pontoon shaped front fenders with 'bubbled" clear plastic headlight covers being the principal change--headlight covers were not allowed on US spec automobiles for many years). There was a fourth "Exneresque" revival car proposed for production, the 1966 Duesenberg from a new, startup company, The Duesenberg Corporation, which used a lot of Exner themes though. Just one prototype was built, on a Chrysler Imperial platform, bodywork again from Ghia--for showing to potential investors in the company, as well as to prospective buyers. The Duesenberg Corporation even enlisted Fritz Duesenberg, son of Augie Duesenberg--brother of the legendary Fred Duesenberg, himself the designer of the famed Duesenberg Model J of 1929-37. Fritz Duesenberg was made an honorary director of Duesenberg Corporation, but took no actual role in that company--he was in rather poor health, and by the early 1970's, was a resident of the Indiana Soldiers Home (now Indiana Veteran's Home) at West Lafayette IN, and passed away there in 1976, having been virtually an invalid ridden with arthritis for several years. This car never reached production, as not enough investor interest resulted in capital needed to start making them for sale. 1966 Duesenberg Model D:
This car still exists, on display at the Auburn-Cord-Duesenberg Museum in Auburn IN, resting there in company with several actual Duesenberg Model A's, a Model X, a Model Y, and a nice collection of Model J's.
Of the two exact copies of Exner's Revival Cars, the Mercer-Cobra, and the Bugatti Type 101C, the Bugatti comes forth as the only car ever built EXACTLY as Exner intended, given his ownership of one of three Type 101C rolling chassis, and was built to his instruction by Ghia for his personal use. The Mercer became the Mercer Cobra, built under commission for the American Brass and Copper Institute, a trade organization of companies producing brass, copper and bronze products, as a means of proposing to the auto industry the use of polished brass, copper and bronze trim on automobiles. As such, it was built on a stretched 289 Cobra chassis, but is probably a bit smaller than what Exner might have envisoned originally--but it sure does capture very well the concept as Exner intended.
I have a couple of each of those in my build pile still--one of these days!