Accoutrements seem to be among the last thing people think they need to improve, but trust us, everybody sees those big while nylon stitches on your cartridge box.  For about as inexpensive as it gets you can get an excellent copy of of a standard Confederate cartridge box that was left behind on the Gettysburg battlefield.  The box includes an oilcloth implement pouch, tins, lead finial, and wire roller buckles.