Got a great deal on some Emg P85/P81. Was going to put them in my Gibson only to find out that the mounting screws are located at different locations! Just slightly off. Can't use the factory mounting plate. Damn you!
If it were me, I'd drill and tap that plate (assuming all else fits ok) for the screw mounting you'd need. If you're not set up to do that, maybe you could find a local machinist or something to help you out - possibly you could mark what you need and send it to one of us that could do it for you. I'd be willing to give it a go, if all else fails