I heard Chrysler is selling the entire Dana 44 axles from Rubicon's with the electric locker and disc brakes. Basiclly a drop in swap if you have 4.10's and you could sell your stock axle to help offset the cost.

PRICING/ORDERING INFORMATION
P5153825 Jeep Rubicon Front Axle Assembly, Locking Differential
List: $1,479.00
P5153826 Jeep Rubicon Rear Axle Assembly, Locking Differential
List: $1,349.00
P5153827 Jeep Rubicon Rear Axle Assembly, Limited Slip Differential
List: $1,099.00

SPECIFICATIONS
Axle Ratio: 4.10
Track Width: 61.9ö
Wheel Bolt Pattern: 5 on 5.0ö
Rear Axle Tub Diameter: 80mm
Front Tube Axle Tube Diameter: 63.5mm
Front Brake Rotor: 302mm Diameter x 28mm Wide, Vented
Rear Brake Rotor: 316mm Diameter x 12mm Wide, Solid