Not exactly what you’re looking for but I use one of these -
https://firesideoutdoor.com
I’ve used it extensively where there is no existing fire pit or simply a stone ring. It elevates the fire on a mesh that allows for air to get under the fire to promote a cleaner and better fire, allows a grid for cooking and all folds to the size of a pack able chair.
The mesh is tight enough to keep ash and coals from falling through.
I also have the “mat” to catch ash and embers to allows to leave a clean site.
It’s a little tricky to use where a fire pit is provided (national parks for instance) where they specifically prohibit fires anywhere outside of the provided fire pit, but I have used it in those instances after a quick chat with the host or ranger.
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