Slow N Sear sells grates made of 304 with the flip up door on one side to go with their charcoal basket products:
https://snsgrills.com/collections/grill-grates-griddles/products/easyspin-grill-grate-22
I have not seen these in person, but from the photos and user reviews, they do not seem as substantial as the Hunsaker ones, and they’re certainly nothing like Mark Baron’s products. I feel like I saw SNS touting the thin bars as a “feature” in one of their articles or blog posts, but I don’t remember exactly where I saw it. I’ll let you all imagine the face I’m making at that notion…