I have a 78 Firebird, and recently found that the lower shock mounting
has somehow become disconnected.  The shock absorber is hanging free in
the air from the bolt at the top of the shock!

I looked at the lower control arm, and I see nothing there that would
bolt the shock absorber to the lower control arm.

I looked in the service manual, and there are supposed to be these "J
nuts" that you are supposed to put a bolt through to somehow connect
the shock absorber to the lower control arm.  Only on my car, these are
gone somehow!

My question is- how do I get new "J nuts"?

Surely someone out there has had this problem before.  Thanks.