ollykiwi3 Olly out of round for a rotor should be under .002" Balance of the rotor should be "0". Does your car have a parking brake. Go for a road test and at 30 mph stop the car with just the parking brake. Pull up on the handle lite. If you have a pulsation it's in the rearend. If you have no pulsation. I would look at the front rotors and wheel bearings. 70% of braking is done with the frontend. If you are intune with your car, it is possible a rear problem but few people can feel this.
Big question, where to you feel or hear this noise? Is the steering wheel wobbling when stopping? Feel the pulsation in your butt? Brake pedal also pulsating? Lets get back to basic checks first. Rick L. Ps I have blown an axle bearing like you said. I had grinding and
oil leaking from the stub shaft seal. Spin wheel over by hand and check for noise or drag. Also check the color and condition of the fluid. Silver color in fluid major problem. I have been racing for 14 years with stock ball bearing on the stub shaft and no failures after first one at 3 miles, my bad.