Joe,
A few years ago I did a brief survey on just this subject, you can find it at this link:
http://forum.lugerforum.com/showthre...n+parts+survey
As you have discovered, the ejector is by far the most likely part of a Luger to break. I have broken two in the Luger I shoot, and a third one chipped without actually becoming unserviceable.
--Dwight