Yup, and it gets sticky, too, and science gets on thin ice here. The duty and compulsion to cure diseases are among the most intuitively obvious duties there are, despite the fact that they do not rest upon any previous voluntary acts of our own. Cloning one's body parts for future transplant is really based upon the premise that duties, obligations, and entitlements arise out of benefits you accept, and not ones you merely receive. You do not really own yourself. If you truly owned yourself, you would have the moral right to sell yourself, and thus give other people the right to buy and own you. Your family and state do not own you---you instinctively feel a sort of obligation to take care of your parents in their later years, but this comes from a feeling of love for them and really nothing else. After all, we had no choice in where and when we were born, and the choices we make are just those, choices, not rights. The idea that we MUST pursue cloning technology without weighing all aspects of it makes us slaves to the wishes of others. Some rights are inalienable, but the right to cloning doesn't exist.
Well, enough rambling.