Hmm. Have you taken a looked at Fusion 4x4 axles.
https://www.fusion4x4.com/online-store/Jeep-JK-Axles-c25661217
I personally run 37s on stock axles. Lock front and rear. I am however light on the skinny pedal. Don't run headlocks. I topically air down to 12 psi. 37 X 12.5 X 17 Cooper STT Pro...