So, I downloaded b218 (from torrent) and created in that version a map that jetZeds posted previously. It is just a map you looking for!
Here you can download it and use in b231: https://www.mediafire.com/file/0an01gcx6oag0p2/East-Cituzaci-County-b218.7z/file
Just unpack to %APPDATA%\7DaysToDie\GeneratedWorlds\