mullion eh?
The dividers I was referring to are the one in the picture that make the one panel look like it has six smaller sections, when in fact it is one dual pane window with the "dividers" sandwiched between the two panes of the window.
The actual large panes can in most cases be disassembled, then the dual pane window itself replaced down at the glass shop, then remounted using the same frames. Sometimes need to replace a fresh rubber gasket along the edges. All this stuff most home improvement stores carry on the shelf.
Of course if the Honey wants new windows with new frames, then that is a whole 'nuther ball game.
All fine and dandy unless you got actual mini panes like mine. I think it is called a colonial pane style.