So as planned I have now acquired XJ8 - X308 rear suspension parts to support transition to outboard braking this winter.
Vented disc model
As expected the bits are in modest but unknown condition so I plan on stripping it all down and rejuvenating the parts.
This means at re-assembly and installation I know what quality of items are there, I won't have to do a drop and rebuild after installation and particularly as these are brake components, I won't risk braking issues.
Cheers