In the process if disassembling my suspension components, I tried taking out the bolt that was on the passenger side control arm. The head of the bolt snapped off. How important is this in regards to alignment? This part of the control arm doesn't seem to be a replaceable part as only the outer piece with the ball joint is available on parts sites.

 

So it looks like this design was discontinued in favor of a one piece design.

 

The upper control arm that you show is still available! I am having the same issue. I need ball joints upper and lower. Can find the adjustable upper but not the control arm that attaches to the frame. They do offer the one piece option. But I have read that it does not give an adjustment for the camber. However all the upper would need is new bushings pressed in but there is another problem finding the bushings. Any help would
be great thanks