Use native CUI icons and elements?

I am working on creating a UI for a plugin and I was wondering if there was a way to fetch icons that are already in the game files to use for my UI. I have browsed through some of the icons I would use using AssetStudio.

Would I have to export these icons and use them as custom images or could I somehow use them like: assets/prefabs/deployable/vendingmachine/ui/vending.png

Anyone got a current list of the icons?