There are four builders of 66 Batmobile replicas, (one is officialy licensed by DC comics), one of which has built over 30 cars himself, another has built almost 20. add 6 or 7 people selling kits for homebuilders, and over 100 replicas is quite posible.
Barris still owns a fiberglass replica, I think it is the one that was used in the Back to the Batcave movie a few years ago. Barris has been traveling with this replica for years as the orignial was far too valuable to move around the country in a trailer. But in best Barris tradition it is "the orignal" Batmobile when shown.