Check OTB's ftp or download map pack. Sorry I'm posting from my phone so I can't give you links :/
This might be it.
Okay, I check OTB;s ftp nothing there, i don't know about the map pack either.Thanks anyway.
Beta folder, because this map is still beta ftp://otb-server.de/pub/Maps/beta/ratzjump2_b1.bspftp://otb-server.de/pub/Maps/beta/ratzjump2_b2.bsp