If that part just happens to not be readily available and will have a detrimental impact on a/c availability to the operators, then so be it.
Careful with that! you may be on the ground a long time! i was told on a Puma Course the Rotor head mast takes 2 years to Age Harden. i think the Epicyclic does also. there was a real shortage of gearbox part a few years back with our O/H place having a backlog waiting for parts.