[Chevy Wrench]

You might want to check out your backing plate. Since it still squeeks after replacing all of those parts, I would tend to think that your backing plate is bent towards the rotor a little. I really doubt that the spindle would get bent or would cause the brakes to make that type of noise. Plus, it is really easy to bend the backing plates. Just get under there and pull it out with your hand. If it still makes noise, well at least you are not out any money or labor. In my opinon, the bearings would have isolated the rotor from the spindle when your rotor got hot. I have seen rotors glowing in the past, not once did it cause the spindle to get out of shape. In order to do that, I think you would have to have an intense, direct heat source to actually hurt the spindle. Good luck