Jacob they are available from Aliexpress for Aud $3.25 plus freight. You need to eybal the pump then just go through the images.  

  Hi I stripped down the chainsaw and found the Circlip holding the pump worm drive to have come off. I replaced the pump , YES THEY ARE AVAILABLE FR ...

My Ozito CSL 036 chainsaw oilfeed to the bar has stopped working. I have cleaned out the tank and flushed with petrol refilled with bar oil , cleane ...