Go to a goodwill and look through the purse section to find various nylon zipper containers. For my scopemeter i keep a pouch that was for god knows what, some kind of organizer or something. It was like a trifold but i keep mm probes, scopemeter stuff and a buncha header cable splices, grabbers etc in it.
The right way to do this is to find something similar to what you need and learn to sow some pouches and zippers on to suit your equipment.