A Fordbarn SEARCH reveals there were both 2 piece and 3 piece 1941 Ford front fenders. Excellent information plus photos are here:
https://www.fordbarn.com/forum/showthread.php?t=313202
It appears they do bolt together- top and bottom. Here's an ad on HAMB showing the "tops" for sale.
https://www.jalopyjournal.com/forum/...s-only.922629/