Truth is you need much more than a wheel alignment to correct this. Even if you have static negative camber, you will under cornering experience dynamic positive camber. It is really a feature of the McPherson setup, and the reason it is bad for performance driving. Lowering it beyond a very specific point is simply making bad worse.
Now, the best you can do is finding SHORT coilovers that are very adjustable, and springs that compensate greatly for the much shorter jounce travel.
I don't have a lot of experience in aftermarket parts, but I would guess that they mostly use quite soft springs in their kits, because modders would complain if they realized how hard their car should actually be.