iran has several hundred missiles. with the two-stage solution, it's possible for the iranians to modify several hundred existing scud-based missiles to the emad/ghadr standard by cutting off the top and replacing it with a stage that includes a rocket motor and warhead.  when the shabeb-3 was in production from 2003 to 2008, 70 units were built per year  totaling 350, in addition to other scud-based missiles. currently, shabeb-3 production continues to this day because up to 90% of the components from the older base variant are reused for newer models. if 70 are produced annually  which is still considered a low estimate  over twenty years, that amounts to 1,400 missiles or so capable of reaching israel. you are right that there are likely spies and double-agents in their ranks, ready to sabotage if needed. but on paper? very likely to be an amount like this.
Norway