I've found the boneyard coils aren't cheap anymore either. You mentioned that the rotor turns, typically the distributor is driven by the camshaft, I am unfamiliar with the 4cyl engine, are you sure that your timing belt didn't break? Try pulling back the timing belt cover and inspecting. As far as ignition system goes try pulling the coil secondary wire from the dist cap and positioning end close to an engine ground, have someone crank engine while checking for spark. If you have spark, problem is most likely with cap and rotor, be careful for shocks. My generic Haynes manual does'nt provide any troubleshooting info for the distributor pickup/ignition module. Try calling some boneyards, I know the optical pickup for my 1993 V-6 wasn't cheap.