'66 C20 control arm questions

[PJ66C20]

Hi all. I decided to rebuild my control arms and ran into a couple snags.

1) one of the upper arm mount studs snapped. Any resource for a replacement? Looks like a wheel stud.

2) one coil spring looks like it has Peyronie's disease. I wasn't planning on replacing the coils, I like the stance as is. Does it need to be swapped out? This wasn't in the budget.

3) the new lower control arm shaft I received is just a cylinder with no bolt holes like the original one. Are they interchangeable if I get ubolts? Or, can I just use the threaded ends if they look the same, nothing wrong with the rest of it. After freight $$ to send back the wrong shafts and get new ones it's hardly worth it.

Thanks