Wow, the quickness and depth of the replies here reminds me yet again why Stovebolt.com is the best site out there!
tclederman - From your link, the leftmost item that comes up are indeed the two rear motor mounts for my engine. These seem to be readily available, and I have a pair waiting to go in.
BC59 - It appears that the Filling Station listing is being sent to the company in my link, Steele Rubber Products, same copy, same picture, same price!
The attached picture shows the sorry state of my front mount (and the need to clean and rustproof my harmonic balancer!)
This link shows the company that does the revulcanization of your existing mount, but as I mentioned of course, you have to send it to them.
https://www.steelerubber.com/motor-mount-service-70-1828-11I'm going to get a broad piece of wood that's significantly wider all around than the oilpan and then go up nice and slowly. Thanks for all your insights!
Greenman Wood