from the site you posted:
" Initially, a von Neumann probe, consisting of an interstellar propulsion system and a universal von Neumann replicator with human-level intelligence, would be launched from the home star toward a neighboring stellar system. Upon arrival it would seek out raw materials, from local sources such as asteroids, and use these to make several copies of itself (including its rocket engines)"

Lately, I've heard the best self-replicator with human-level intelligence might be...a rocket ship piloted by a human being!
Although... Tonight I can't even fix the garage door opener with the new parts we ordered, so I have to stop working on that and I'm returning to my other mandatory activity
-- a job search.
I ended one chapter in my novel with this line about a sentient spaceship: "Kalex went out into the galaxy to look for a job."