Are any of these servers what you are looking for?

Servers with "srcds150" and "Valve" in the name:
Valve MvM Mann Up Server (Luxemburg srcds150 #30)
Valve Beta Server - Asteroid 24/7 (Luxemburg srcds150 #55)
Valve MvM Mann Up Server (Luxemburg srcds150 #32)
Valve CTF / SD Server (Luxemburg srcds150 #43)
Valve KOTH Server (Washington srcds150 #4)
Valve Beta Server - Asteroid 24/7 (Luxemburg srcds150 #56)
Valve CTF / SD Server (Washington srcds150 #63)
Valve MvM Mann Up Server (Washington srcds150 #51)
Valve Beta Server - Asteroid 24/7 (Washington srcds150 #15)
Valve Attack / Defense Server (Washington srcds150 #5)