Broken broken aircon pump pulley + dual mass crank pulley

[CTScott]

It is definitely not a common occurrence. Is the center of the crank pulley still bolted on, or did it come loose and then zing around under the hood?

The compressor pulley is not purchasable separately, and a new compressor runs over $1000 from the dealer. A new crank pulley is about $120. With both, you can pick up used ones from a junkyard or off ebay for significantly less. When swapping out the compressor, the refrigerant will be lost, so you will also have the cost of evacuating and refilling it.