To make better use of my Ikea Ivar shelf for my electronic equipment I decided to do a quick design in Shapr3D to be able to use a half wide shelf.
This design is for a fixed height, but you can always stretch the model inside Blender to your need, but I also added a STEP file for modifying.
You need to mirror the model in your slicer of course to get both parts.
Printed this on my Ender-5 Plus with PrinCore PA12 CF filament as it was already loaded (o;
The author hasn't provided the model origin yet.