[thstone]

As cameronzero suggested, start by having a competent shop perform an alignment. Tell them what the problem is and they should be able to adjust the alignment settings to address your concerns.

Undertand that everything is a tradeoff: The previous owner of your car probably had the alignment set to achieve as much negative camber as possible to improve cornering. Reducing negative camber to reduce the uneven tire wear will result in poorer handling in corners. Be sure that you're willing to accept this tradeoff.

With that being said, there is a chance that the parts and resulting geometry of the aftermarket suspension (you did not specify exactly what components are installed) do not have sufficient range in adjustment to adequately compensate for the uneven tire wear. In this case, adjustable front control arms MIGHT be the solution, but there are likely other solutions just as well. Talk to a competent shop about what changes make the most sense to acheive your goals.