Only 40 blue GT350 Hertz models were made in 1966, of those only 17 remain. This is also the car that was used to create the blue hertz model kits for retail.
1966 Shelby GT350 Hertz Blue
William Deary and Peter Brock discuss the innovation by Carroll Shelby to make Shelby GT350's available by renting one through Hertz. This specific car is one of 17 Blue models left, and was used to create retail model kits. You can still rent a Hertz Shelby Mustang today (just not this one).