$74 for the whole enchilada, minus the hose. Not sure if rebuilding it is worth it other than experience or if you know what exactly is causing the leak. The link is to an '07 C model, but I suspect all of them are the same. http://www.hdlparts.com/fiche_section_detail.asp?section=527868&category=Motorcycles&make=Honda&year=2007&fveh=12128
Edit - Well for an '03 it's $118 so I'm not sure what the deal is there.