Morris Minor 1931 differential pinion crown wheel

I´m looking for a differential for a Morris Minor SV 1931 - the same as MG type M, or Morris Minor OHC or later Morris Minor types from the thirties, or at least the pinion and the crown wheel and the aluminium casing. I´m from the Continent but coming to GB in the summer so I can collect the pieces. Thank you a lot for any offer.