What parts are you looking for? The Nikko overunder shotguns were the same(nearly) as the Winchester 101's. That means they too are probably afflicted with firing pin breakage problems. I don't have the book here right now but have a Digest which should list the makers/importers if they are still being imported. Just a question but have you checked the normal parts sources, such as GunPartsCorp or JackFirst? Also the Winchester website has a list of obsolete parts sources and sources for the 101 would have parts that would work in your Nikko o/u.