A shame all around.
Just this past year there was discussion of installing sprinkler heads in a room w/ a fireplace during a residential remodel- especially for the insurance discount.
My first thought was no way could it be run in pex, as the homeowner was expecting, for this very reason!
A few months back I was shy a Viega 90 for a temporary hotwater baseboard re-route; what I did have was a few fittings which had been cut out. Rather than cut the collars off, I took them outside w/ the torch. Wow-liquid fire.