We should have gone ahead and fitted more Skinz sheets to the door cards as I mentioned before that I was going to do on my car. Just unfortunate your budget didn't stretch that far then. I can get you some Skinz mate. Will call you to discuss how to best go about sorting out the rattles / resonance in the door cards. Still need to find some time to do mine too. Not so much rattles, I expect, as resonance from the bass in the doors, lol.
The link you posted looks like the standard stuff they put in cars from the factory. Skinz will give better dampening of the resonance which is what you ideally want to do.
