Uncoupled brakes conversion?

[Colin Bromley]

There is evidence that my 1924 Chummy had a 4 wheel brake conversion at some point in it's life. This is unsurprising, as the original owner seemingly had almost every accessory part available fitted during his ownership. Does anyone have the parts lying around, that they'd be prepared to sell?
Even if the bits are only fitted for show, I'd like to have it, as he did...