volvo.keystonemotors.com You'll have to call their number 800-351-5077, but very competitive and good reputation over on swedespeed.
ipdusa.com
www.ipdusa.com Mostly for upgrades...very friendly and stand behind everything 100% of the time, but quite expensive.
partsgeek.com
partsgeek.com If you try them let me know how they are.
If you'd like to add a Volvo parts store to this list, or would like to add a comment about a Volvo parts store,
email it to me matt at matthewsvolvosite dot com