I got them from Discount Fleet Supply, but it looks like their price went up. Think about the flicker. If you don't want the flicker skip the H4-H13 conversion harness and get a Rally light harness. The H4-13 costs about $15 and will flicker. The Rally light harness takes power from your battery and kills the flicker, it costs about $130. The point being I bought the H4-H13 and couldn't take the flicker, so I bought the Rally light harness a couple weeks ago. Could've saved the $15 on the H4-H13 conversion harness.