Yes. Have normal SYs. Then, have a facility that is called a Space Yard Expansion Project. It does nothing, but is in the same family as another facility, the Space Yard Expansion. You can build Space Yard Expansion Projects on planets with a SY, and then upgrade them to the Space Yard Expansion. That way, you can get factory worlds that pump ships out like there is no tomorrow. Atrocities accidentally created such a system here with a typo.
