Ac trouble..hot in oklahoma

[yamaha_2000r6]

95 eclipse gs fwd 420a manual. I've looked through the posts and can't find the help I need. My wife drove the car to work the other day and heard a bang and said it sounded like something fell off then the ac stopped blowing and the compressor light switch flashes. I thought she was crazy so I got under the car and low and behold it looks like the compressor clutch is gone. Problem is I'm not sure what happened. I can see a friction plate and a ribbed shaft that looks like it had a bolt in it at one time. I'm guessing the bolt came out and I lost part of the clutch. Question is can I replace just what was lost, or do I need to buy a new compressor? Any advice or pictures will be appreciated as I don't know what the compressor looked like before it flew apart.

Thanks in advance