The suicide king illustration is original art, created by our neighborhood friend and former colleague, Mark Minnig. It's printed on the back of a 6oz (thick) 100% cotton Gildan Hammer pocket-tee.
The shirt is boxy, the art incredible, and you should definitely have one.
Thanks to our friend @pharaohmotors for help with the pictures. You won't look as good as Fumi in this shirt, but you can try.