My 3.9 had rebuild at £200, reset to 100 lbsft £50, side seal, pinion seal, solid spacer, MAXI grip kit, CWP bearings (2), side bearing, flange bolts and came to a total of £678 plus VAT which included shipping and painting. I imagine the costs may have gone up since 03/14? Bara did a fantastic job, great support and even sent pics of before and after etc. I guess the prices depend on what needs to be done.

My diff on a 3.9 took a long time to locate.