Here is a pic of the M dead pedal.
Let me know if you would be interested in one. The dead pedal is not too expensive, $61 retail. BMW does ask for an interior code though which may mean it is more than just an overlay. I am not sure if it would work in the 1 either.
The M thing is my own personal preference. The one on the shift knob is already gone from my car and I will wait a bit to deal with the one on the steering wheel. It is just not my thing. An M on the dead pedal is much better than slapping an M on the back of the car though.