I gotta agree with bare.
If something is not on hand, don't include it in your order for parts you want right away.
It seems the backordered parts are sent from India on one of those ships that keep getting taken by the pirates along the African coast.
There, the ships are held until someone pays the ransom fees to the pirates or until a Navy vessel sinks the pirates little dingys and boards the ship.
Then, there's the rounding of the horn that must be done, often at the risk of loosing the topsail's and the jib's.