Lockheed subbed out the spares support off to an outfit in Ohio called Hi-Tech.
They basically have not got a clue about this aircraft. They have about $60m (list price) in L1011 spares but never seem to have the bits currently needed.
As for SB kits etc they are a total waste of time!
There's a few independent spares support companies out there that keep the right bits you need together with wheels, brakes and other "no go" items.
That small group supply the RAF (MOD) and the others with parts and work together to help operators out in a pinch!
I should mention there are a few operators who are CIA (Cash In Advance) due to non payment for AOG parts.
It's a small world and everyone knows who they are!