(note how flawlessly the textures are aligned despite the weird angles...
By xMurphyxDownload Blank Corridor from FileFrontDownload it from Rapidshare
This model comes as an add-brush construction in a map-file. It's textured. The textures that aren't taken from the game are in the myLevel Package of the map-file so don't even worry about them. In addition the mapfile has the StaticMeshes seen in the images above in its myLevel package.
I wouldn't just use this corridor but use it as a base and add some pipes or wires, maybe additional lamps on the ceiling. Have fun with this!