(Image by Paul Ros, Licensed Creative Commons Attribution-NonCommercial)
Here’s Pipe in Furtherfield’s show “The Human Face of Economics”, along with Urinal and Balloon Dog. You can buy one from them along with a certificate of inauthenticity.
The 3D Additivist Manifesto video features the Urinal in its teaser image.
Here’s an animated GIF by Alan Butler featuring a rare credited appearance of Balloon Dog.
And this melting Balloon Dog is from Michael Green’s luxury.obj
If you see the Shareable Readymades in the wild, let me know!