Question on Copyright

I have encountered a PDF file that contains scanned images of a textbook as
part of a class. The number of pages is small enough to qualify for fair
use, but the format is grossly inaccessible.

Is there a good way for teachers to obtain an accessible format and still
qualify for fair-use? For myself, I just found the text on Bookshare, but
many others don't have the patience, and my skill doesn't help teachers who
don't have access to Bookshare.

Best, Wayne