Car buyers in Australia and other RHD countries have long got the short end of the stick in terms of American muscle cars. The reason is quite simple: they drive on the "wrong" side of the road.
Most manufacturers are unwilling to do right-hand-drive conversions on what are essentially specialist models: cars like the Chevrolet Camaro, Dodge Viper, Ford Mustang and the like. There just aren't enough buyers to rationalize the cost.
Fortunately, a cottage industry (or rather a man-in-a-shed industry) has popped up offering RHD conversions of American muscle cars for eager buyers in countries like Australia, the UK and Japan.