I got a 36ft^2 bulk pack from eBay for about $118 shipped. The install went pretty well, albeit very time consuming. I managed to get from the start of the rear seats back. You can really tell the difference. I need to get two more bulk packs to finish the job, i.e. doors, front and firewall. If you haven't done it before, make sure you use small strips.
It freaked me out a little bit to hear the back so quite. The road noise is less, but the intake makes up for it. My lady loves that noise
End Result:
http://www.aveoclub.net/phpBB2/garage.p ... age_id=154