If you want I've got approx 12 sqm left over of the sound deadener i used in my ke20 corolla. I covered the boot, whole floor pan, rear quarters, doors and around the fire wall. Went double over the transmission tunnel. After this i had John at John's motor trimmers to make up the new carpet and a decent under lay. Haven't got the chance to test it out as of yet as the car is getting finished off. I'm sure there will be a noticeable difference.
The deadener works a treat and is easy to apply.

Happy to give a little bit for you to test it out or show you my car by knocking on it.