That would be great to have, it does seem like a simple bit of metal - not really all that fancy it seems. The screws are there and I assume the mount part is still there!
My biggest problem is that I don't know what to look for or ask for - since I don't know what used to be there. It's a total mystery to me.
I did find the wanted section and I figured I'd focus on my brother's Jensen. One should sort out the "paying customer" first LOL. That Jensen has it missing bits and its fire box was modified (which is worse IMO when something was changed - ugh!).
I wonder if my little D10 would be strong enough to make the windmill work - that would be kind of funny to try!