Hey, I'm new here & don't know much about the 3's yet (I don't even own one yet) BUT...I saw a lip spoiler for the 3 on E-Bay for $118 today...
here....
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7912136324&category=33638&sspagename=WDVW