Hi, DeLong1 and welcome to INGO. The little Norinco I have is a semiauto, not a pump. As it's a direct copy of the Browning .22 ATD (Auto Take-Down) which is still being produced for Browning by Miroku in Japan it was at least a fair bet that a Browning part could be fitted. I got lucky, and it did fit without having to be reworked.
IIRC, your Norinco pump is probably their model EM-321. I would suppose that, like most things Norinco, it isn't an original design but I have no idea whose design it's based upon. If you can post pictures, perhaps someone more knowledgable might be able to point you in the right direction.
FWIW, about the best, most consistently reliable resource of parts for obsolete/discontinued firearms I know of is Numrich (AKA: The Gun Parts Corp.). Google or the like should be able to give you a link to them. You might have to be able to provide them with the factory part number, so I hope you have the manual. They might not have what you need in stock, but if anyone in the U.S. is likely to run across one anytime soon, it'd be them.
Another resource you may want to try for help identifying a potential 'donor' make for a replacement extractor are the folks at Rimfire Central. Some very knowledgable folks there and many serious collectors.
IIRC, Norinco products are still imported into Canada and you might pick up a lead for replacement parts from one of their members from up there.
Sorry I can't be of more help, but hope this aids your quest.
IIRC, your Norinco pump is probably their model EM-321. I would suppose that, like most things Norinco, it isn't an original design but I have no idea whose design it's based upon. If you can post pictures, perhaps someone more knowledgable might be able to point you in the right direction.
FWIW, about the best, most consistently reliable resource of parts for obsolete/discontinued firearms I know of is Numrich (AKA: The Gun Parts Corp.). Google or the like should be able to give you a link to them. You might have to be able to provide them with the factory part number, so I hope you have the manual. They might not have what you need in stock, but if anyone in the U.S. is likely to run across one anytime soon, it'd be them.
Another resource you may want to try for help identifying a potential 'donor' make for a replacement extractor are the folks at Rimfire Central. Some very knowledgable folks there and many serious collectors.
IIRC, Norinco products are still imported into Canada and you might pick up a lead for replacement parts from one of their members from up there.
Sorry I can't be of more help, but hope this aids your quest.