I ended up going with this from Amazon:
The plan is to attach four of these on the inside of the kettle, using a 10-32 black stainless button head screw on the outside of kettle, and fastening it down with a stainless locking washer and nut. I will let you know how this works out. Here is the Amazon link:
25 x 25mm L Brackets Corner Brace 90 Degrees Right Angled Fastener Connecter with Screws for Wood Furniture Shelves, Cabinet, Bed Fixation, Black 20 Pcs
https://a.co/d/dTaUwq7Sent from my iPhone using
Weber Kettle Club