You can find just about any texture you want with:
TextureIt
Just type what your looking for in the search box or search through the tree...my guess would be something like navigate through: ESOUI -> icons -> crafting -> (all over the place, under metals, ore, smithing,...)
Or you can use zgoo and just open a crafting window, click on create, hoover your mouse over the picture of the trait material you want & type /zgoo mouse.
Then look for the texture filename. You may have to click GetChildredn & then open up the icon control to find it.