I don't think I have this download somewhere.
If you want to play just any map with more civs, you can also play with 50,
https://forums.civfanatics.com/resources/bts-3-19-50-civ-gamecore.13181/ , and make the maps compatible yourself, see this tutorial
https://forums.civfanatics.com/threads/modding-maps-with-a-text-editor.374496/ .
(yes, would it be better if we had something like this ready made? certainly. Maybe we have it even somewhere else in the database, not sure. But this is right now what I can tell you is possible. Sorry for not being more helpful)