Suspension upgrade on 4.5

[SL500]

I am fitting Power flex bushes etc. onto my 1999 4.5 Cerb. I have obtained some new and good condition wishbones as mine were rubbish.

I have a question on the rear lower wishbones. On the chassis end of these my original wishbones had a small bush and smaller housing, but on my replacement they are a lot bigger, my Power flex bushes will not fit these. Does anyone know if they are off a later Cerb or Tuscan etc. They are identical to my old ones in every way.
I can then obtain the correct ones once I know what they are off.


Cheers