Are any of these servers what you are looking for?

Servers with "Killing" and "Floor" in the name:
[CN]BeiJing-KillingFloor-Server #4
TNT_Killingfloor
BODEGA - Killing Floor HOE [CyberianGames]
MLA Killing Floor - Hell on Earth Long - Perks Enabled
wolfpackclan.com [WPC] 3 | Aliens Killing Floor Server
-=PTP=- Killing Floor II
Weltenbrand - Killing Floor - Join the Glory Hole
simHost.org KillingFloor #2
NGW Killing Floor #6 [WA] (Easy)
NGW Killing Floor #7 [WA] (Normal)