[Teever]

Nature provides us with a really good platform to develop on: https://en.wikipedia.org/wiki/Anencephaly

If we were to mass grow clones for organs we would probably start with whatever causes this and then add an engineered pituitary gland organioid that is added via surgery to develop the anencephalic clone to maturity for proper organ extraction.

You could even use this to grow bodies for eventual head transplants.