Eclipse 2001 GT crankshaft
 

Hi guys,well here's my problem. My crankshaft pulley (I think) that the alternator belt runs around on came off, not the whole thing just the outer ring that has the ridges on the outside. I've put up some photos so you guys can see what I'm trying to explain. The first two photos are of the outer ring part of the crankshaft pulley I was talking about. The third photo is the remaining part of the crankshaft still on my engine. And the fourth photo is a wider view of the remaining crankshaft pulley. What I would like to know is it completely broken or can i still manage to fix it? Any info would be appreciated. Thanks.