Keep your yes open in the Equipment Exchange, friend. You NEVER know what might pop up there.
You need the Bolt, Bolt Carrier, Action Cover Assembly and Safety Block. Parts ARE available to fit the Bolt to the Rifle, keep your headspace in spec.
Factory PARTS KIT which came with the rifle included spare Extractors, Firing-pins, FP Springs and so forth. Lots of guys have these.
They actually made NIGHT SIGHTS for these rifles (radioactive as hell, mind you!) and a very nice Blank Fire Adaptor so that the rifle could be used with those wooden-bulleted blanks.
Good luck!