Sounds like you need a whole suspension refresh. Replacing the front thrust bushings is rather simple once you get the arms out. That's what I elected to do to mine. The poly ones might transmit more noise.
If you're having camber issues, I would start looking at joints and your bearings.
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2003 BMW X5 3.0i -- MT5, 3.64s final gears, H&R lowering springs, K-Mac bushing kit
2007 BMW X3 3.0Si -- MT6
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