Lohen in the UK sells this kit, consisting of the same stuff they use in the shop during installs. Aside from the guide tube seal, I couldn't tell you what the other stuff is. But I included it in my order from them of Quaife & Helix clutch kit.

https://www.lohen.co.uk/lohen-differential-fitting-kit

CMT's list looks a bit longer though!

 

Yep, but don't forget I did the clutch also...

MINI 21-20-9-454-318 Pressure Plate - Mini
MINI 21-51-8-607-922 Ball Pin 219999 - Mini
MINI 23-11-7-568-469 Shaft Seal 238520 - Mini
MINI 23-11-8-651-159 Shaft Seal Output Shaft 238520 - Mini
MINI 23-00-8-484-418 Sealing Cover 23999900 - Mini
MINI 83-22-2-344-589 Manual Transmission Fluid Mt 832514
... and so forth (rivets, nuts, incidentals)

Cheers,

Charlie