In OE4, you should be able to equip human, infest or cloud stardocks/bays/ports, and choose from more types of ship for the other two factions (in the infest fighter bay it should make spores as soon as it is placed and then another ship can be selected for it to produce as well).
 "Obliterate Everything 3"){kind=icon}
 "SNAFU Tower Defense"){kind=icon}