"Hello,
I just thought I would inform you that selling illegal reproductions of One Industries' graphics is highly illegal, and morally wrong. I'm not telling you how to run your business, but I just thought I would let you know you're going to get yourself in a huge pickle with selling these graphics with their logo on them. If you had written permission from them then it would be a different ball game, but being that you probably do not; it is illegal what you are doing. Hope you make the right choice and don't regret this later on down the road."
That's what I messaged him. I will post back with a reply if he sends me one. We shall see...