Hey, my liver is going bad so lets make a clone and cut that liver out and put it in me. Now I've got a problem if it takes a full human clone to produce my new liver. If science can clone just a liver for me and nothing else then lets get going on cloning.
The problematic issue centers on the in vitro process. If cloning to reproduce a fully expressed, living individual human is the goal(and it's hardly a surprise there's nothing in the NT regarding cloning), no individual is being discarded. I still don't like the notion of designer individual human beings.
As to your other query, if science can someday grow organs using only your individual stem cells (and there now known to be throughout your body), I'm all for that!
The notion of designer individuals is a bit much for me to take and I suspect I would not take part in such a thing.
I don't image a clone would be anything other than a 'biological' replica.
A person is transformed into individual by their experiences and such so my clone might be subject to the same weaknesses as I am in that we might both die of heart failure but we will be individuals because our experiences are different.