To answer his question:
I do the majority of my own gunwork as I had the privilege of spending about 5 years of quality time with a master gunsmith (Charlie Calcote) in Gardener, Louisiana and I have access to all the tools I need at a local gun shop in Colorado Springs.
If I wind up in a jam though, I will call Greg Lent in Woodland Park. He is the "Chronoman" for the USPSA Nationals and other major matches, and an excellent 1911 gunsmith in his own right.
Mikey: FYI: The "ILS" is the "Internal Locking System" that Springfield incorporates in their mainspring housing. It's basically a little pin that is turned 90 degrees, with a little key they provide, and the camming action of the pin locks up the hammer strut against the mainspring housing top pin so that the gun cannot be fired since the hammer works are effectively seized up. It's a pretty simple gizmo, and worth looking into since ALL Springfields now come standard with it.
I think I understand what you mean about the sear spring being out of alignment. I always run the mainspring housing up, and over, the sear spring just enough to ensure that my hammer strut falls correctly into the hole and the sear spring is resting correctly on the bottom of the sear prior to dropping in the grip safety. Once the grip safety is in position, then I will finish sliding up the mainspring housing in it's rails if everything is fitting snugly where they belong.
I'd be surprised, honest, if you "really" needed to replace the ejector with a longer one. If you're experiencing failures to eject, it's probably some other type of problem.
Anyway, I wish I could take a look at that pistol for you. If you are near Woodland Park, I'd be happy to do that.