Are any of these servers what you are looking for?

Servers with "Zombie" and "with" in the name:
{IR} Europa - Zombies With Friends! 24/7

Servers on :
.::[The Undertow] The Green Room::::::...
.::[The Undertow] HardCore Rockets::::::...
.::[The Undertow] Snipers 24/7/365::::::...
.::[The Undertow] NO-MODS, Complete Map Cycle::::::...
.::[The Undertow] Hardcore Snipers::::::...
.::[The Undertow] EXCESSIVE ROCKETS::::::...