I've got a couple of pictures but all the parts are now buried in the loft with loads of other Sierra bits so sizes will be a problem
Slave cylinder and rose joint from Merlin Motorsport.
You will need to make up a pair of 'top hat' bushes to nip up on the centre part of the rose joint and prevent the pedal from crushing.
The complete ratchet mechanism was taken off and I had to remove a bit of metalwork on the pedal assembly that was in the way, no pics of this though.