Edit: I finaly found it... Here it is: http://www.mediafire.com/?e8uj3a3ntfaarff
ratio.py
1.Put the file in the scripts folder.
2.Add a "ratio" line in your scripts part of the server's config file like this:
"scripts" : [
"welcome",
"rollback",
"trusted",
"autohelp",
"protect",
"map_extensions",
"airstrike",
"squad",
"disco",
"antijerk",
"savemap",
"ratio"
],