Hey I own a car audio shop and just did an install in an 09 keeping the factroy headunit. It slams we did 2 Re audio 10s ported and an re audio xt4000 amplifier.
Heres a link for the enclosure hit me up if you need any help.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&Item=330391597719&Category=50565&_trkparms=algo=LVI&its=I&otn=2