I recently made a set of pouches and canisters for my old Begins/Dark Knight Batman belt. The pouches are over-sized a bit as they were intended to hold a specific set of batarangs (these here if you are curious: ebay.com/itm/32191219...) (search ebay for “batman money clip” when that link dies). The pouches were made out of 5mm foam and the canisters out of 2mm foam wrapped around a wooden dowel.
Here is the template I made if you would like to build these yourself.
