Looking for one rear body mount and bolt

What does it look like?
Is it a bonded rubber thing about 6" long with a mount bolt protruding from the center face?
 
This is the mount. It has a matching rubber isolator that goes on the bottow but the upper half is bonded to the metal sleeve. In my case, one of mine the metal sleeve refuses to come off the bolt.IMG_0528.jpegIMG_0529.jpegIMG_0529.jpegIMG_0528.jpeg
 
The other mounts use the carriage bolt. This one is larger and has a hex on both ends. Jim has them but $70 for a used one. Looking to see if someone here has a parts coach and want to sell one
 
GM part# 699895 - Mount Assy. body, front and rear incl. ring (SOA)

IMG_9416.jpeg IMG_9417.jpeg
Number 4 in the diagram.
 
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AKA vibration isolator. Others make and sell them but you probably won't find one that matches up exactly. I bought some that we're taller. It was OK for me since I did a frame off resto-mod but there are several places where adjustments must be made if the height of the isolators changes. It's nice having a little more finger space between the frame rail and the body. To answer your other question - the front isolator has the same dimensions.

PJB, 76 Royale