My own version of The Argument from the Origin of the Idea of God would be like this:
1. We have ideas of many things.
2. We are dependent beings.
3. We cannot actually create anything on our own, we can only use and rearrange what is already available (both physically and mentally).
4. One of the ideas we have is the idea of God.
5. This idea could not have been caused by ourselves, because we know ourselves to be limited and imperfect, and we cannot actually create anything on our own.
6. Therefore, the idea must have been caused by something outside us.
7. Therefore God himself must be the cause of the idea we have of him.
8. Therefore God exists.
Between 6 and 7, we could add that aliens or demigods have caused us to have an idea of God, but that just relegates the question to what their nature and position is; but unless we define those aliens or demigods to be God, we're back to God being the originator of the idea of God (even in a scenario of a deist god who "set the whole thing in motion (and gave the aliens and demigods instructions to give us the idea of God) and then retreated").