Why would you even want to do that? Right now this isn't possible. But with the new technology and the 3-D printers, doctors are now able to make a few organs to help repair the damaged one. It is amazing what 3-D printers can do these days. Technology has come a long way and who knows maybe one day they can take a tissue sample from you and clone you a brand new heart. I'm not sure how good this would be if the rest of your body is failing. You can replace certain organs to make a person live longer, but it is the actual body that really matters. An old frail body can't really support these organs if it isn't strong enough. If it were up to me and I'd lived a full and happy life I wouldn't want a cloned organ put in me to make me live longer. People actually get tired and in the end, I do believe they welcome the peace of going to sleep and not waking again. They need peace and this is one way they find it in the end.