At one point in time PSC offered a stock box with a 300M sector shaft, I don't know if they still sell it or if it was discontinued in favor of their big box. Also if you are open to tackling this in a different way look up west texas off road and their redneck ram. you can have your box rebuilt and ram assist for about half what PSC wants for their system.
2004 Rubicon (auto), 4", TW 1350 CV shaft, Skyjacker High clearance transfer skid, 35"s...
2016 JKUR (auto), 3.5", Artec AL armor, MC fenders