The t-shirt from Victory Brand will set you back £25 (or about $40). International shipping is extra, but almost half of the purchase price is donated to charity. They're handprinted in London.
£10 from each T sold goes to Love Bank, a new social action fund dedicated to assisting individuals, informal groupings of people, and small community organisations by providing small one-off grants to those who seek to build equality and human rights, improve the environment, and foster social change.
And, if you're so inclined, there's a couple of photos of a very well hung naked man modeling the shirt at this link. It is, of course, not safe for work.