We can tthrough money at production, we can throw manpower at production.
What we can't do it through time at production. Modern high-end interceptors require a lot of precision machinework that simply takes time. And many of the guidance components are made from minerals we do not have a large stock of. Can we make them? yes, can we ramp up production? yes.. can we make 100's a day? not in our wildest dreams.
Paladium, Gandolinium, Neodymium, Dysprosium, Samarium, Praseodymium, Terbium... we don't have tons of the stuff just laying around.