Screw in wood or plastic gun rack hooks (the sort you normally see on pickup trucks) on dividers (im visualizing u using bout..4 pairs of racks, with inner 2 being on a divider) and you may be able to get it to also have a way to put a middle tool box or similar to it design, that way you can hold oh say, 8 KPs in there and have room for a box and mask and air
or you can go classy and install felt lined wood dividers