We've not been able to source any 'failures' outside of some fragments of the space shuttles that fell on people's land.

We're looking to get as many failures as we can before melting down out rings, casting in the debris in appropriate masses and compositions (they still needs to be steel rings at the end), and then reforging/casting the rings for all of us, with enough of an ingot left over to continue the process as 'failures' continue onward.

It's entirely symbolic, but does take effort and time.