I purchased this from www.partsexpress.com -
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-020 and
was quite happy. It's cheap! Heavy, but cheap. Next time around might try
the next step up which is lighter - had some difficulty at first adhering
sound deadener to inside of bodywork, but cleaning area where it was applied
a using contact cement helped enormously. Inside of door panels made a huge
difference - they shut with a "clunk" rather than the previous
"twaaaaaaang." ;~)

Tom