Thingiverse
MakerWorld
MyMiniFactory
Printables
Thangs
Cults
CGTrader
Youmagine
Gambody
Etsy
Tags
Aaaa 3D Printable Models
Universal stackable crates with signs and optional inlays
Thingiverse
BMdesign
Gridfinity CR2 Battery Trays (multiple sizes)
MakerWorld
Dalkain
Gridfinity 3x5 Ultimate Battery Holder (AA, AAA, AAAA, 2032, LR44, A97, 18650, 9v)
Thangs
Michael Fuchs