Having cloned organs ready for transplant won't extend life as much as you think. A lot of this doesn't mean much if you can't replace a faulty circulatory system, which will inevitably cause organs to fail even if they are brand new.

Unfortunately, a circulatory system is practically impossible to replace. It would cost tens of millions of dollars and you'd have to already be in great shape to survive the very long recovery time. And then you do all this, only to die eventually, all the same.