This 4th picture shows that there is a lot of war and possibly a missing piece of metal on the opposite side of the extractor, but since the whole band is one piece and needs to be replaced, it doesn't make much difference.
JC42DLM Repair 4.jpg
These two pictures show how the ejector kind of "catches" the extractor. This would explain, at least how the left (your right) got chipped/broken off. Not sure about the opposite side, though. The 2nd picture actually shows this a little better.
JC42DLM Repair 5.jpg
JC42DLM Repair 6.jpg