Check American Ancestors of NEHGS homepage… www.americanancestors.org
Click “The bookstore”
They have a list of remaindered books (extras etc.) which they have for sale. There are over 600 listed. The list includes many states, countries, counties, you name it. There might be something of interest.
Some of these books could be listed on the Internet Archive or other sites that may have old books. You can look at some old books page by page and copy what you need.
The copyrights are expired or never existed. At the very least it may give you an idea of places to look for more information on the ancestors.