Dave ,
My understanding is the 406 Salisbury diff is similar to a Jaguar Mk2 , so suggest you look at a flange from a Jaguar and compare with the 406 flange .
Why does the 406 flange need replacing , they are a robust part ??
I have never seen a 406 tail shaft with centre support bearing , but check your car as it could be modified.
Geoff
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