I am refastening WS. My labor is "free", screws are not. Silicon bronze flat head wood screws made in the US are the Holy Grail, and appropriately priced. On a whim I searched Ebay and found a guy who bought up US Navy surplus screws in exactly the size I need at $50/box delivered. I ordered a box to check them out, then I ordered a lot more. If anyone else needs them, here's a link:
https://www.ebay.com/itm/100-Reed-Pr...4AAOSwSlBYvNQu