Diff wanted for 1931 sv saloon

[minorman]

As you mightg have seen on the technical section, my diff is somewhat ropey. Having been advised that the pinion is irreparable, I am looking for a crown wheel and pinion. The current pinion has 9 spiral cut teeth so I assume it is one of the 9/44s I have read about on here. I am in the process of re-shoeing her with 3.40x19 tyres instead of the 4.00's she came with as the owners manual only gives that size for the year. Also I hope she will climb the Downs a bit better even if a bit slower on the flat; I have to change down into second very early.
So does anybody have the necessary parts for sale, please?
Dave