An organizer for the ProSteel HSC8E safe sold at Costco. I designed it for my specific use case but someone out there probably can use it too. Thus, I included the STEP model, so edit to your hearts content.
Designed to hold 2 bottles of Mossy Oak CLP (needle oiler and sprayer), 4x P226/8/9 magazines, and 3x mag takedown pins (mine are from my Mec-Gar P226 mags). No idea if Glock/P320/P365/any other mags will fit, but they might if the geometry is similar.
Uses 16x 6x3mm circular magnets to hold the organizer to the safe. Any less and the organizer won't stay in place with loaded magazines.
The author marked this model as their own original creation.