Z28-50

These are pictures of an unknown (to me) rubber cushion in the front upper shock mount of a 1995 Camaro.
The unknown cushion is between the dog-bone and the body.
The flatter part or bottom of the cushion sits on top of the dogbone.
The ring fits in to a recess of the body.
Is this rubber orderable?
What purpose does it serve?
I have all the other parts new and hate to put this back in used.

You can click on the pics for a larger view.

The first pic has what looks like a part number of 22112178. Part number does not show up on any parts fiche.
The last pic shows the order of assembly.

shoebox

Was 17999212 a part that you have ordered? I am not sure if the above it is as I have always thought the exploded view of the shock/spring assy was a bit off, somehow (which is not all that uncommon).

[edit]
Looking now at some of my old pics and the diagram again, I don't think the part number above is it. I actually don't see it listed or shown. Doesn't it just sit on the top? I can see the imprint of it on the underside of the top of the shock tower in my old pics. LOL, I would have to take my car apart again to look at it.

Dave89IROC

All I know is that a friend didn't install them, and kept breaking shock mounts until he got new ones

bluz28

That rubber piece fits into the top of the upper control are mount, it doesn't mount on the shock assembly at all.

Z28-50

That's correct, I left the upper control arm mount out of the picture. I guess that made it confusing.
My point of the post is whether these can be ordered and what their purpose is.
Any insight?

Thanks