[ithacaartist]

Gents, I have some thoughts on this. This extractor system is the same as on the KGP series toggle pistols by Erma--the ones that are mostly steel, made in the 70's and 80's. In the pic I will attach, you can see that there is an area on the rear of the extractor just above where the little rounded "tail" is on the bottom. That small step is where the end of the plunger pushes, forced by the spring. Retention of the extractor body also depends on this step/plunger/spring pressure. It isn't a very robust setup, like a pivot pin, so it's easy to see how the extractor would pop out during operation. If the entire extractor is missing, then there wouldn't be anything to hold the spring and plunger in place, as Rich suggests.

This is a part that is scarce as hen's teeth these days, even if it is a match for the one pictured, from a KGP-68A. If the dimensions match up, it might just work, and I have one for sale. If not, you'll have to make one, which, though perhaps troublesome, is not impossible.