A good start would be too check out the Jeff’s Bronco Graveyards site. Or Bronco Graveyard, or whatever it’s called now with Ford trying to take the word “Bronco“ out of some of the names.
Or JBG for short.
We’ve all got a certain number of body parts and frame mounts, but they’ve always been kind of a key in offering replacement parts for things that rust out.
Being in Michigan, that was probably a priority for them from early on.
Good luck!