Here’s a couple sources for accessories (hooks, or trays for a pretty versatile gridfinity system) that you can 3D print for the pegboards that are in some of the spaces. Some are slightly tight for the holes so you might want to file them slightly.
Hooks: Pegboard Hooks (US) by Forker45 | Download free STL model | Printables.com
Gridfinity Base: Gridfinity base for 1＂ on center pegboard by HobbyCNC | Download free STL model | Printables.com
There are plenty of Gridfinity compatible things you can find, but here are some sample trays: Gridfinity standard bins with label + parametric file by Akio | Download free STL model | Printables.com
