Comfrey and Walking Onions (Ferntree Gully)

Would anyone have some Comfrey that I could take a section from? Need Comfrey/knitbone for chronic bruising condition. Also after Walking Onion as my brother was a very keen gardener before his health deteriorated, currently undergoing chemo. But he loves pickled onions and walking onions a very low maintenance and perfect size for pickling. Any assistance would be greatly appreciated.