The quest for CS-600 FET Jumbo Servo

I have been seeking for the simillar type of FET Jumbo Servo for quite sometime. This is the actual CS-600 Servo Motor that I'm looking for.

In fact, this servo is suposedly the most powerful of its kind. This is the big one! The CS-600 is the strongest servo you will find. And, thanks to the special FET motor drivers, you do not have to sacrifice speed to achieve high torque. This servo boasts an incredible 333 oz./in. of torque (6v supply), yet it is one of the fastest servos in the Cirrus line! We recommend the use of a high capacity 6.0v battery pack when using this servo.

So far I have two official quotation from HS-422 for RM85 which torque is about 4.1kg/cm at 6V. The other is Hitecc china brand 4kg/cm = RM70, 7kg/cm=90, and 13kg/cm=RM110.
As this CS-600 is 333 oz/in which is about 23.3kg/cm. Thus, I have to narrow down the replacement for this jumbo servo. Else it would be small enough to carry the weight of the projected robot.