I have replaced both the distributor and the.

I have to guess you have the 2.5L V-6.

If that was a disc, that is to set the critical air gap. It slides off the first time the engine is started. I've never seen a rubber spacer. Chrysler's come with a thick paper spacer stuck to the end. Many aftermarket replacements have a thin plastic rib molded to the end. If you remove those and want to reuse them, you are to cut the remaining part of the rib off and use a new paper spacer from the dealer's parts department.

If you pushed the sensor all the way in when you installed it, most likely it is broken from hitting the flex plate. You can verify that by measuring the voltage on the dark green / orange wire going to the distributor or any injector. You'll find 12 volts there for one second after turning on the ignition switch, then it should come back during cranking. If it doesn't come back, there's no signal being received from the crankshaft position sensor or the camshaft position sensor.

Just one spacer. I suppose there could have been a protective plastic cover but I've never seen a crank sensor come with one of those. It wouldn't fit through the hole anyway without being removed. The paper spacer is stuck on pretty hard. You would probably need razor blade to get it off.

Have you checked for voltage on the dark green / orange wire? Have you checked for diagnostic fault codes?