Where can I get cool hard hat stickers?

I wanted to get a few stickers for my hard hat to personalize it a little, so i wanted to add some icons of things i like (my choices were: Targaryen sigil (from game of thrones), a creeper face (from minecraft), Radiohead's logo and Rush's logo (the band. The problem is I can't find anywhere to get stickers like these, I could make them, I found a few websites that specialize in making custom hard hat stickers. However, that creates another problem with regards to copywrite laws. I don't think I can legally submit images that are copywrited for them to produce… Either that or they legally can't produce them. So I was wondering if there's anywhere else I can get stickers like these?