I'm interested in possibly using one or more things from the "story missions" like those in the title in my custom maps, but none of them are listed in the map editor anywhere, and I can't find a "canonical" place to download or import them from if they're script-based. Are they just somewhere obvious I haven't noticed, or is it necessary to somehow import them from my save files on the relevant maps? Or are they just not available period at the moment?