I have an old Amiga hand-held scanner, still haven't tried it even though I mentioned it ages ago on this thread.

There are copiers that are made for the specialized kind of copying you want to do. We have a couple of them in Special Collections at the university library where I work. The glass is right to the edge of the machine so you do a half of the book at a time with the other half hanging down--the book is never open more than 90 degrees.

Then there's this kind. Or you can find an automated scanner that is easy on the books.

Probably not in your price range, but maybe someone in your area has one and will scan some pages for you?

SRS