Ebay seems to be where most guys are getting their header these days. Most found on there are knockoffs and two common issues are fitment and weld quality. Some guys have had pretty good luck though. Here's a link to the OBX site...not sure if they still stock/sell for the P5 http://www.obxracingsports.com/products.php?pk=931 and then there is this option http://www.racingmazda.com/protege_exhaust.htm.