Did you save the old LC in case you will figure out how to replace the bushing?I don't think you can use a regular pressing tool (you can rent for free btw) to repress a ball joint into aluminium control arm such as this one. From my understanding it's not exactly a pressing out / pressing in for this case, it might require machining. At $165 for a complete new arm it's not worth the hassle, IMHO.
No, they both looked fine to me, no cracks. The ball joint seems to be stressed the most, which makes sense.Did you see any deterioration on the other bushings on the LC beside at the the ball joint?