Front lower suspension

[pugcrew]

I need to replace the lower wishbone as the lower ball joint has gone.

I've been looking at the various options and wondered whether there is any difference between the saloon and estates?

Some sites list parts that are suitable for saloons but when I put the details for my ZTT they say it doesn't fit.

I can't see that there would be a difference but can anyone confirm?

I've got the CDTI.