accomplishedProblem is, it doesn't look like these are shirts that are going to be sold by the One Campaign (and the logo looks a little like the DATA one, so I get the feeling that this may have been a customised shirt for Bono.)
So, I did it myself.
Click for Hi-Res
I made the base picture fairly large so that you can resize at will. I prefer the black, but the white's easier because 1) you can't get iron-ons with white ink and 2) if you want to get it screenprinted, it's a hell of a lot cheaper to do it onto a white shirt. That being said, I also did a version that can go on a black shirt (similar to what Bono's got going on there).
If you want a shirt with this on it, feel free to take the images and use them to make your own. I don't have the resources to make batches of shirts, so if someone wants to organise that, go right ahead. Heh.
Please don't spread round the base images that I've provided - it took me way too long to do this shit. Please link back to this post instead. Also, no hotlinking. Thank you.