PJ2
You said "I know of no cockpit crew rest installations which are not near the cockpit. I have seen one option when in the cutting-metal stage for cockpit crew rest facilities below the tail where the F/A's facility was also located and it was rejected out of hand by the pilots association, for what ought to be, (but I take nothing for granted on this thread), obvious reasons."
Probably not relevant to AF447, but the normal cockpit crew rest offering on the A340-500/600 is in the bulk hold. I believe there are several in service with it.