My idea is an inset storage in the vault with shelves and bins that could possibly labeled/removed. Currently I chuck all the dye/shells in a crate, so removeable drawers that could be labeled to sort small things easier in would be neat. I'm pondering the storage itself remains in the vault, but the drawers themselves would be crafted from wood/metal/cloth. I've been googling curio cabinets this morning for a while as a result and they are shiny and terribly expensive.
Storage Cabinet
A sturdy pine frame shelf, with room for multiple bins that hold space for small knick-knacks