I've had a broken grate for about six months now and I've been meaning to pick up another one for a while. The other day I saw on the Naked Whiz site that he was trying out this one from from high-q.com. It looked like it would allow more airflow so I ordered two of them and it came in today. It's made of 304 stainless and looks to be pretty sturdy. Warranty is 5 years but I haven't read it yet.
I fired it up to do a couple of spatchcock chickens and it took only 13 minutes to come to 400 degrees. Usually, this large egg takes about 20 minutes to get that hot. I'll let you know how it holds up.