According to Land rover there is only one Transfer case from 2006 (2005 LR3) to 2013 in the Range rover, LR3, LR4 and the Range Rover Sport (from 06 to 14) . Part number, LR049060, and it fits all forms of the Land Rover Range Rover models, HSE, Autobiography, Lux, High Lux, and the Supercharged versions (using the 4.2L (06-09) or 5.0L (10-13)gas engines). These are the old part numbers the current one replaces, IAB500230, IAB500240, IAB500241, IAB500243, IAB500244, IAB500280, LR023011, LR023568, LR035617, LR035618, LR045477, LR054851. It's 4200 dollars at the dealer, with a 1200 dollar core charge if you want a brand new one.
Can't just replace the output shaft and seal, or does that take major surgery? Or it there more wrong than just the shaft? Remember to keep your mechatronics unit unless you can reprogram the new one to match your vehicle. I believe they are VIN locked to one another.
Transmissions for a 2012 supercharged 5.0L are a bit more specialized. there are 3 different part numbers for them with 3 different VIN breaks in them. Theres one model for VINs up to CA374232, theres one from CA374233 to CA390072, and there's one from CA390073 and up. Have no idea what the differences are and whether its the transmission, or the control assemblies. Depending on where your VIN falls it can come from a 2011 thru 2013 Range Rover or Range Rover sport as long as its supercharged. The transmission from the middle range of VINS (LR043927) can actually come from a 2012/2013 LR3 or 4 or a 2011-13 Range rover or sport with a non SC 5.0L engine.