If all else fail, ask for a pig liver. Or, ask a human for part of their liver. A liver can regenerate so all you need is a piece, not the whole liver from another human.
"Pig liver transplants to humans
The pig liver was used to temporarily keep Pennington alive until a human liver became available, but surgeons at Baylor hope to one day transplant pig livers into humans. There is concern, though, that humans could pick up a virus from pigs."
"A liver transplant involves the removal of a PORTION of the living donor's liver so it can be transplanted into the recipient patient. Eugene Melnyk, the Ottawa Senators owner, was recovering after undergoing a successful liver transplant at Toronto General Hospital. (CBC)"