I'll treat that as a rhetorrical question.
If I take some stuff and create artificial sperm, and I take some other stuff and create ans artificial egg, I have created another "thing"
The big surprise in all of this, is that we will find out that it ain't gonna work... cuz we ain't God.
It was not a rhetorical question.
You cannot say where your soul came from, other than "from God," and so you are in no position to judge whether or not another thinking, feeling being has a soul.
To answer your original question, this hypothetical child would get his soul from the same place you got yours. How his body got put together is beside the point, as the soul is by defnition not part of the body.