AMK is by far the best source there is out there, but even so, on my car only about 25% of the bolts (without captive washers) and machine screws (with captive washers) appear in their catalog with all the exact same attributes such as head marking and captive washer diameter.

I did use their excellent catalog with photos of each of their items as a base line for listing all my fasteners, saving me from making photos in most cases. The reason I made a list is so the fasteners can be bulk re-plated and then put back where they came from.

For a nuts and bolts restoration, in many cases, but not all, you can use generic nuts, washers, and tapping screws because the originals were generic. It's mostly just the head markings of bolts and machine screws that are an issue.

Being knowledgeable about AMK's website and listings has been a big help.