OK, I haven't got them in my hands yet but the issue has been resolved. The correct name for what I was looking for is a "Rubber standoff". I saw the ones Mcmaster has and not exactly the right size, but the closest I could find, however they were stupid expensive. I'm not going to pay $45-$85 for a single rubber donut. I found many the right shape but wrong size, I couldn't find anything correct id and od taller than 1/2". I ended up having to buy 3 and expect to have to bond them together and slice one in half to get my 1 1/4" thickness. The one in the photo above is 1" tall, 2" od and 1/2" id. However it is under the heat shield and the other side won't be. By-the-way, that is indeed real asbestos under that steel plate. It's best to leave it alone. No real substitute for asbestos has ever been found. I used Rust-Mort on the steel where it had some corrosion. It doesn't do anything for the looks but does stop the rust that's there.