Fuel Tank Rear Mount Rubber Grommet Damper

Does anyone have a lead on replacing part #13? It's NLA and can't find it anywhere in NOS. Any aftermarket versions, or a part from a different bike that will work? No other bikes cross reference for that part # but maybe something else will work.

The XS650 grommet has a pad attached that goes under the tank (maybe replacing #14 on the 400s). Was thinking if all of the other dimensions were correct that I could trim the pad portion off, but it has a conical bevel on the top side. Open to other ideas.

Also if anyone has one laying around on a spare tank let me know.

 

The diagram in the post, can you not see the image? It's a SOHC.

Here's a picture of it:


^in case you can't see that either, this:
http://www.xs400.com/threads/gas-tank-damper-rubber-mounts.9345/#post-96624