Adding new tools to the CNC tool list

Just purchased my Snapmaker 2.0 and I would like to add some different CNC tools to the list. How would I get the files for them?

When selecting the tool for a tool path, click on the gear icon next to the popup list icon and you can add bits there. You’re limited to the types of bits supported by Luban, but you can specify the diameter of end mills, for example.