I got my Honda dealer to order them in for me. He ordered them from the Motovan catalog
Quartz Halogen H4 Bulb - P43T Base - Part number 04-137 (Standard 35/35W)
04-137 on this page, were only $4.99 each - http://www.gbourque.com/eshopprod_cat_8292-62407-62466-62467_product_1423909_keyword_.QUARTZ_HALOGEN_H4_BULBS_-_P43T.htm