Do you know the vin number of the car your rear axle is from?
I ask cos there are 2 different upper mountings listed & also 2 options for the rubber bushes, 1 for each upper mounting
If your VR6 donor car was made before about the middle of Nov 94(up to vin nr 1H-S-221035)then the rubber bushes are the same as the G60 Golf ones, as are the through bolts @ 78mm long,
later than this there are different part numbers for everything + the through bolts are 4mm longer sugesting an increase in depth of the same amount.
While the early VR6 brackets have a different part nr to the G60 ones, it would suggest that as the through bolts & the rubber bushes are the same parts then the G60 brackets would also be a match,
the part number for the early VR6/G60 rubber bushes is 331 505 171 & for the later (thicker?) VR6 bushes is 357 505 171