My completely stock 1993 Civic DX has quite a negative camber angle cookin for the front wheels. It's my understanding that an out of whack camber is do to worn out parts, and I've read here many times that a camber kit is recommended to fix.

Here are my questions: What part(s) are typically to blame for negative camber?

For example, if upper and lower ball joints are to blame (which I do suspect) or upper arm bushings, can they just be replaced with after market ones to cure the problem? Or is the only way to fix this problem is by installing a camber kit? Because I'd rather not have to shell out $200+ for a camber kit if all I need to do is replace the worn parts with some el cheapo ones.

Thanks much!
Ryan