How to get the Empadronamiento from another small city in Spain ?

I'm getting marry to the smallish national . now they telling us to start the civil marriage earliest appointment its in 4 months. i can't wait that long my documents and my visa will be expier. the only way its for me to get Empadronmiento from the another small city in spain. is there anyone knows how to do that or the way to get it fast without living in the place ??