This may be off topic or in the wrong place but trying to be helpful.
My coal stove is a Russo #1 which takes a similar round disc and cradle base and these were pretty hard to find a few years ago. I don't know what their availability is today.
I don't want to be a "Knucklehead" and I have a new, never used set for the Russo #1 stoves. It is absolutely NOT for sale at any price but if it is needed to make a mold from I would offer it up for that purpose with a guaranteed return. My existing grate and base are fine for this season so far but I love this little stove and want to keep it functioning as long as possible. Others who have a Russo #1 might be in need of either the base or both pieces if they too have gone away and need to be made by a foundry.