I needed them for a standing desk setup to allow me to comfortably view my monitor and still store filament in the space above, but if you have plenty of z-axis for storage, maybe this helps you too. Fusion file is attached if you want to modify.
These fit snug and slide over the existing posts and the shelf can be dropped back on. My shelf posts are exactly 1 inch in diameter so if yours are the same then these should work.
I printed out of pet g with 5 perimeters for strength, but everything is in compression and it is a top shelf so it shouldn't be seeing too much load…
The author marked this model as their own original creation.