Brian - if you are just looking for a "H" divider and not a 1-1/2" or 2-1/2" divider bar. Admiral (http://www.admiral-wholesale.com/dividers/) has one or maybe Excellart. For all other options SignComp (http://www.signcomp.com/category_all.php?cat_id=29) would be the company that would have the most divider bar options.