I think that what you are referring to is definitely in the works, and has in fact been successfully done, using a 3-D Printer, which sprays a media solution containing stem cells plus pancreas cells (instead of ink).
After a human pancreas is scanned by a computer, the Printer sprays (prints) the solution on a man-made piece of screen (instead of paper), that is made of a bio material that will not harm the human body.
With each pass, the printer sprays another piece of screen and puts it on top of the prior piece. This causes the stack to grow higher and higher, in the shape of the pancreas, but sprayed with stem cells and pancreas cells.
Then, I think that the whole thing is put in another solution, and allowed to "grow." I don't know how, but those stem cells think that they are in a damaged pancreas, and simply grow into a new one. The screen material, being a bio-matter, simply dissolves over time.
I believe that this was successfully done in Europe last year, but the cost was over $1 million to do it. Plus you need the stem cells, DNA etc from the person who is to receive the organ.
At $1 million a pop, I don't think we will be seeing these much any time soon. No wonder they are just trying to grow them inside a pig.
Problem is, there is a huge difference between what is scientifically possible, and what is financially possible.