Are any of these servers what you are looking for?

Servers with "left4dead2" and "Valve" in the name:
Valve left4dead2 Server 01 (srcds033.sea-1)
Valve left4dead2 Server 10 (srcds033.sea-1)
Valve left4dead2 Server 06 (srcds033.sea-1)
Valve left4dead2 Server 08 (srcds033.sea-1)
Valve left4dead2 Server 04 (srcds033.sea-1)
Valve left4dead2 Server 05 (srcds033.sea-1)
Valve left4dead2 Server 02 (srcds033.sea-1)
Valve left4dead2 Server 13 (srcds033.sea-1)
Valve left4dead2 Server 03 (srcds033.sea-1)
Valve left4dead2 Server 12 (srcds033.sea-1)