Tried to make it aesthetically pleasant with a bit of customization: modules can be combined and swapped whatever way you like. There's more: smaller modules are exactly two times narrower than bigger ones so you can print two smaller modules and place them instead of the bigger one if you like.
Please note that current organizer base supports two modules in a row. And “one big + one small” or “three small” modules in a column.
Print using whatever material you like. No supports required.
Update: I've added a smaller base suitable to print on Prusa Mini. It can hold up to one column of modules.
The author hasn't provided the model origin yet.