It looks like you're looking for a full download of Counter-Strike: Source (CS:S) that includes the MasterServerVDF fix — a common patch required to make old versions of the game see and connect to online servers again after Valve discontinued the original master server protocol for older builds.

• Click File -> Save As.
• Name the file masterservers.vdf.
• Important: Change "Save as type" from "Text Documents (*.txt)" to "All Files".
• Save it in the platform\config folder mentioned in Step 1.

Download and Availability

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If your server list remains empty even with the file present, try these common fixes: