Listed below is a breakdown of the parts needed and cost.
Axle seal 31508743675 - £13
Propshaft seal 31521428678 - £10
Side bearings LM501349/LM501310 - £15 X2
Big Pinion bearing HM88649/HM88610 - £15
Small pinion bearing M86649/M86610 - £15
Type 168 differential preload spacer- £16
Id 39x2mm O-Ring 31511213527 - £6
Diff oil gl5 75w90- £15
Total £120 plus £100 on tools if required.
Tool to hold the flange
LandRover Drive Pinion Flange Holding Tool 5.0L + 3.0L Diesel OEM Equiv 205-053
www.ebay.co.uk/itm/362223306903?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=yvwl7HUSReq&sssrc=2349624&ssuid=oN1hMr0_RfK&var=&widget_ver=artemis&media=COPY
Preload for this differential is 0.6nm to 0.8nm
Torque specifications
Case 45nm
Pinion has no spec,it is right when at preload spec
Differential to engine is 45nm
Oil plug is 60nm
Axle to hub is 420nm
Propshaft to differential is 65nm 
I used eBay and www.hendersonbearings.co.uk to get all the bearing for this diff. (Not sponsored)
Any other questions just ask and I’ll try and help.