I have a solution for that, getting some from Partsexpress.com myself. Check out the sound deadening section of their site, also FYI FOR EVERYONE, they have a ton of stuff on clearence right now.
For BesthatIcouldo...
http://www.partsexpress.com/pe/showd...number=268-250
It's a lot lighter than DynaMat and similar products, water resistant, and flexible. YAY!!