Ejector help????

Hi all, I have a old "white powder wonder"20 ga. an ol fella brought me to "fix" it needs all the parts for the ejector. any/all help in locating the parts i need is GREATLY APPRECIATED!I had no luck crossing it to a manufacturer befor & hope someone can help me out as i'd like to get it back to him ASAP. THANKS IN ADVANCE! Dennis Johnson