I've been shooting my Colt Defender .45 for about 2 years and had my first mechanical failure. The extractor tip that ejects the shell casing broke off. I talked with a gun smith and he provided me with a standard ejector. However, looking at the original, it has a hollowed out (concave) section that allows the Firing Spring F/P (SP56764) and the Firing Pin Plunger (p/n SP56765T) to fit into the slide. Unfortunately, the colt website is out of stock for the extractor pin (p/n SP567531W). I am hesitant to put in the standard extractor and not install the Firing pin plunger and spring and use the gun. Any thoughts out there regarding this or where to get a replacement part?