Well, we could discuss the semantics of that.
Complete vehicles allocated as training aids to schools were registered along with those on issue to units, so should turn up in the registers. I've recorded plenty of instances of that happening for Centurion, Leopard, M113A1, Ferret, etc.
Spares, particularly those classed as 'fast wearing' were normally calculated on a 12 month usage basis, extrapolated to life of type, so deliveries were on a rolling basis, not all up-front at the time of acquisition unless the overall quantities for the life of type were small. In any event, my point was that new vehicles come with spares, and that a proportion of the new vehicles would not be unregistered and broken down for spares, as seems to have been suggested.
Mike