I took the A1 / A1 mini Tool Box and made it taller so you can fit more tools and accessories.
You will need 6 - M3x30 screws for the hinges and latches.
Pins STL made by another designer https://makerworld.com/de/models/74688#profileId-79085 instead of the screws.
The following Tray's work with this model. So you can insert the original Tray and one of these or mix and match.
https://makerworld.com/en/models/154104#profileId-168432
https://makerworld.com/en/models/154197#profileId-168544
https://makerworld.com/en/models/154112#profileId-168441
https://makerworld.com/en/models/158849#profileId-174354