Lockhart philips, google it. I dont think you can order via internet, you'll have to give them a call. Strangely enough headlight brackets are a pain in the ass to find for cheap. The LP ones are 50$ by the way.
Another great place is the local junk yard. I have come across some nice ones from several different bikes. I don't know where you are located, but in Sacramento there are several places on recycl road. If you don't have any luck in your area, let me know and I can take a look for you..