Contact Tom Heller, "Luger Doc" here on the forum for the firing pin. He may even have a matched number for you!
Do not plan on storing the pistol in a holster. Tanning acids from the leather will eventually damage your pistol's finish! Buy a quality gun rug and keep it there. If you occasionally want to store it in a reproduction holster, companies such as IMA, (International Military Antiques) and Pacific Coast Canvas and Leather have nice reproductions;
http://www.pacificcanvasandleather.com/