This customizer generates patch panels for keystone jacks. Those are the modular jacks you can get all over the place.

This is a cleaned up version of the keystone mounting jack by jsadusk. I've changed it so you can make patch panels with an arbitrary number of rows and columns. You can also adjust the amount of spacing between the jacks and change the mounting hole size.

UPDATE: I modified the padding parameter so you can separately adjust the width and height spacing