I was surfing over six (supreme immortal xperts) old website (http://mir.vtrbandaancha.net/SiXv5/) and found these good ones, all downloads working great there only site not updated itself. ^^
If you are lazy, np: \/ \/ \/
flowmaps.zip
mirmaps.zip
(https://i.imgur.com/qDQeQMf.png)
Yep, they're random generated, I guess.