The sourceop_090beta_win.zip file you have requested: Utilities / Server Tools / SourceOP / SourceOP: Windows Manual Install (v0.9.0) - 17.86mb is not available. Perhaps try browsing all files for the game Half-Life 2 and upload any files you want to share or are missing. This is the only information we could locate:
SourceOP is a server side plugin that uses Half-Life 2's plugin interface to add extras to HL2 mods such as Half-Life 2: Deathmatch or Counter-Strike: Source. These extras include things like: kick, ban, slay, and of course fun items such as a hook, jetpack, fun with physics, entity moding, and many others. It also provides a way for admins to remotely adminster their server. This zip file containing all files needed for SourceOP. Used for manually installing SourceOP on Windows. See the Installing Wiki page.