I got a quick question for you. I'm searching the glass panel with a hole in it's center (to shoot a portal through it). I don't seem to find it in the model browser under all those available models, so if someone could tell me it's name or destination folder I'd be really thankful.

Regards,
iSpectra

Just look for "hole" in the model browser, there are two: "frame_hole_small" and "frame_hole_large" although they're just that, the holes you'll have to combine them with the frames and the glass (brush)