I’ve heard good things about these.

https://www.ecstuning.com/b-kmac-par...s/193726j~kma/

That being said if you’re experiencing super bad wear on the inner 1.5 - 2” of your rear tire, the culprit is a worn out lower ball joint. I’d replace those before I went with a camber kit.

These:
https://www.fcpeuro.com/products/bmw...er-33321095631