I’m fairly certain I have the shirt you’re referring to. I bought it at the West Seattle street fair, this past July. The company that was selling them was, I believe, called “This That”. You can find their web site here, and ask them – http://www.thstht.com/
Edit: I just snapped a photo of my t-shirt’s logo (excuse the worn look. It accidentally found its way into a bleach load. Although I kind of dig how it gave it the faded look. Happy accident?)…
http://web.stagram.com/p/294175994056903785_4773426