Here are several more sites that may be helpful.
http://www.1stsubaruparts.com/
http://www.subarupartsforyou.com/
http://www.premiersubaruparts.com/
http://www.subarupartsmall.com/
http://www.subaruparts.com/
http://www.subaruproparts.com/
http://www.ipdusa.com/