You can actually buy them at Cargo Collective, where they insist:
We found metallic type that could, in theory, show up on TSA scanners that would display the 4th amendment. The clothes are designed as a silent protest against the new reality of being searched to the point where we’re basically naked. We don’t intend for this to be anything more than a thought-provoking way to fuel the debate about safety vs. civil liberties. If we sell a few items, great. But the main intention is to open more dialogue. It’s more of a conceptual piece than anything else.
This is great outside of the box (and onto the boxer) thinking.