A long time ago I purchased the camber links/Hotchkis strut bar from Bottle some 4 or 5 years ago for a drop on some coilovers. Unfortunately, I don't have the pics of a 2" drop any more and how much the rear tires were off including the wear.
If I can remember, the left back tire was 3% or more of negative camber stock.
All was fixed and so was the front.
Like an idiot, I didn't get an alignment until I got not my second, but 3rd set of coilovers with a less of a drop (long story).
Everything came together with the camber links and camber plates with any alignment specs I wanted. There was a slight problem with the back and toe, but I think it was the place doing my alignment or my screwed up car.
I just always thought that if you lower it, you might as well get the most out of it.
That includes tires and alignment at least and more. That's another story.
Camber links, crash bolts 2 or 3, camber plates, Eibach bolts, H&R...
I don't know other than the camber links and no one wants to comment on the cheaper ways any more. They say get it, but can't give pics., a scan of the alignment before and after, or if it even will help and how long.
This goes for the crash bolts also. It seems it was erased into history on all accounts.
Figure the drop and go from the experience at these sites.
There's a plethora of info here and there.