Marc,
I did find that the First National Bank of Monroeville, AL issued both large and small national bank notes. Kelly shows about 3 large and 9 small nationals from this bank.
Since nationals are not a purview of this forum, you might want to join the the Collectors Universe at
http://forums.collectors.com/categories.cfm?catid=23 Nationals are discussed often in this forum.
A large national from this bank is shown here:
http://forums.collectors.com/messageview.cfm?catid=23&threadid=588018&STARTPAGE=6A small national is here:
http://currency.ha.com/common/view_item.php?Sale_No=338&Lot_No=19625. The heritage archives are invaluable.