Bakelite door knobs (round) (Calcutt HG5)

Hello, Just wondering if anyone has a couple of old Bakelite internal door knobs that they don't want. They need to be round ones something a bit like in the picture, any colour. Metal bits not required. It's to complete my sister-in-laws old house in Australia and they're struggling to find any over there. If you also have a key for the rim-locks that these went on that would be handy too. Many thanks