So what I read is: Definitively Cossworth will not fit.
If it is Sierra or Scorpio, is still open, when we talk about 253mm vented and 4x108mm.

Does anyone have a parts catalogue of Sierra and Scorpio? On 7zap there are no pictures for these parts for Scorpio. And those for Sierra show only drum based....

I could go for solid disk, but this requires as well new brake calipers. And, it is unclear if this would fit to the spline I have...