HIGH STANDARD .22 CAMP GUN (PARTS?)

ANY BODY KNOW OF A PARTS SUPPLY FOR THESE (BESIDES GUN PARTS, JACK FIRST). I NEED CYCLINDER LOCK PLUNGER, THIS PART IS DIFFERENT THAN SHOWN IN THE G.P.C. CATALOG. THE END OF THE EJECTOR ROD IS THREAED AS OPPOSED TO THE ONE SHOWN ( SENTINEL).