I have used the following two online OEM parts dealers. It's
now pretty much a tie between them for total cost (shipping
+ OEM parts costs).

http://www.hondaautomotiveparts.com/auto/jsp/mws/PartsSearch.jsp

http://www.slhondaparts.com

There's a third in Colorado I have used, but IMO they're
still getting their act together, and the inconvenience of
dealing with them outweighs the slightly lower total prices.