By my memory, it was stated at VOI.7 that about 12.5% were "gone"...Sept. 2002...so, at that point, one can say that of the roughly 16,581 (taken from Maurice Liang's book...hoping that my addition is close to correct) produced from 1992-2002, it is likely that 14,508 remained. Another variable will obviousil be the definition of "gone" and how many may have been "restored".
Add in about 1,800 of the 2003's...and around 2,500 of the 2004's and 1,800 of the 2005's (ALL of these Gen III numbers are GUESSES!!) which equals around 6,100 Gen III's ...with a FINITE but unknown loss rate...but applying the prior 12.5% loss rate (may NOT be the same for Gen III) gives a survival number of at least 5,337.
So, my OFF THE WALL GUESS is about 19,845 Vipers remaining (or more)...but the BIG unknown is the exports. Since I have been guessing all along, I'll guess 800 are "abroad. making and state my final U.S. GUESS as 19,045.
The Viper Mag. stats MAY exclude non-registered cars.
OK, rip me !!!