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Put up a Want To Buy on the EE or contact the various Site Sponsors who sell the surplus guns, like Westrifle, High Caliber, Marstar, Corwin Arms etc. would be your best bets.
What he said... Good luck unless you buy messed up rifle for next to nothing. It's not worth the trouble unless it's some rare SKS. My buddy who is just getting into reloading brought one to my place today. Bunch of parts are messed up since he messed up on his ammo. After looking around the interwebs he just decided to buy new rifle. Sorry, both parts you asked about are FUBAR on that rifle...
I think you mean extractor since the ejector is integral with the receiver and not a separate part. Not worth buying a new rifle over. Call High caliber. If they don't have them, call these guys;