I have something that may help. As far as I can tell the image is fan made, but I have got my hands on a version of it. Because it is black and white you can enlarge it without losing quality, so if you resize it and print it off, any good t-shirt printer could put it onto a shirt for you. You'd probably be able to choose the colour as well. I know a shop in Edinburgh does this for about £6 so you will probably get it quite cheap all over, I'd imagine. Hope I helped