I don't have my car to look at right now, but do you think it would be possible to somehow set up something like a camber plate, where there is slots running perpendicular to the car, allowing the UCA upper mounting points to be moved inward and outward to adjust camber? This would not change the control arm itself, and the rules state that camber plates can be used. Would changing the upper mounting point of the UCA affect anything else, maybe caster?
What do you think of this idea? Maybe there isn't even room in the wheel well to slot the mount points, who knows