An inexpensive way to replace grill grates with expanded metal mesh for almost any grill without a plasma cutter, welding equipment, or a cutting torch. This took me about an hour. You can get the expanded metal mesh from just about any hardware store. You'll also need an angle grinder with a steel cutting disk. You'll also need a piece of scrap lumber to cut a slot into to bend the metal.
I don't know the gage of the expanded metal but it was the thinner option at Home Depot and it was not galvanized.