Thingiverse
MakerWorld
MyMiniFactory
Printables
Thangs
Cults
CGTrader
Youmagine
Gambody
Etsy
Tags
Steckregal 3D Printable Models
Hooks and holders for boltless shelves
MakerWorld
3D-Druck Nienburg
Cheap shelf leg protect, Regal Steckregal
Printables
RaymondKelly
Heavy-Duty Shelf Filament Holder for TKT Toom Rack
MakerWorld
martin
IKEA LACK shelf connector, customizable
MakerWorld
RoboPrint