I had some scrap stainless, FiberFrax and foil tape so I went to work making a heat shield.
I used my roller a second time (only had it 3 years) to roll my over-sized piece of stainless and fit it over the exhaust.
I made some trim marks with a marker and scrap cardboard and went to work cutting out my piece with the die grinder. I like to use scrap angle as a cutting guide for straight lines, works well for filing too.
Heat Shield with the edges cleaned up.
I made and riveted some attachment brackets to the heat shield and covered the side opposite the exhaust pipe in Fiberfrax and aluminum tape.