'Spare' is a dirty word in the industry today, as idle stock still costs money to lease. TOC's operate on a shoestring of vehicles, leasing just enough for the franchise requirement and an allowance for maintainance and normal repairs. Accident damage isn't normally allowed for, and TOC's will normally have to muddle through and hope for the best, and, if the operator of multiple franchises, see if anything can be procured 'in house'.
NXEA have had long enough to tackle this problem; it hasn't exactly sprung up overnight. Nor is it a short term issue. A few days, OK, but four months is totally unacceptable.
The ORR must insist that NXEA find stock from somewhere, even if it means hiring in loco and coaches. The fact that they are to lose the franchise should not come into the equation.