Where do I find the materials needed for Zig's workshop?

There seems to be something very strange with his material requirements that I think I can only find where isn't common. It's almost like they're only in Ultimate Quests or some sort, which is something I'm not looking forward to but that's all I can guess of where I can find the materials I needed for him to start crafting, but where do I find them in the first place?

you find then in certain UQs for upgrading weapons and units, others will require to fulfill is orders by doing crafting