Technical 2013 Fiat Panda 4X4 Rear Differential HELP-PLEASE

[OGITD]

Hi everyone,

I'm really in need of some help here .... my panda requires either it's rear-differential repairing or replacing, and I'm struggling to find anyone to repair it, or source a replacement.
Any help in this matter would be greatly appreciated.
T.I.A.
OGITD.

 

[Bonefish Blues]

What's happened?

 

[OGITD]

I've had an oil-leak on the rear diff, and now I'm looking for a refurbished unit or a repair, as once warm it gets rather clunky going round corners.

 

[OGITD]

Also if I knew which one is fitted, I just might be able to find a replacement unit from a salvage company.