Portal 2 Textures needed

Does anyone have or know where i can get a texture of the portal 2 “fizzler” which is found on the exit of a chamber?

should probably be in the materials folder in the pak01_dir.vpk file if you just search fizzler or field or something

Could you please explain how i would go around extracting the texture? It seems to think its a DLC/steam addon…

GCFScape