Road & Track and Motor Trend post braking distance from 60 - 0 MPH for their tests, so I recommend checking those two sources. Car & Driver posts braking distances from 70 - 0 MPH, and the 325i back in 2006 it was 161 feet, but that was a sport package model.
Now that said, and I'm not sure what you are trying to prove, but braking distance is a very subjective thing and depends on a lot of factors, such as tire age and condition, tire type, brake system condition, available grip on/of the road surface, weather, and driver reaction time, etc. The data you seek is data from instrumented tests, performed by professional test drivers, one new cars, in a controlled environment (that removes driver reaction time from the measurement), which has no relation to real world braking performance. Meaning that if you are trying to prove that you were a safe distance (more than 126 feet - to use the distance quoted earlier) behind a car, both traveling at 60 MPH and used your brakes to their maximum effectiveness you probably would have taken far longer that 126 feet to stop to avoid the accident.