Stator plays no part in your problem. The flywheel key is a "D" shaped key that aligns the flywheel, they can be bought at most hardware stores. As for the bendix... good luck, I have seen a flywheel cover cut in 2 so that the bendix was held in place but the rest of flywheel was open, you could inspect the bendix in operation to see exactly what the problem is. I'm not sure what the application was but i think it was for tuning the timing on a dyno.