I have the one from trailtech, can be had for a bout 150 with the idiot lights kit.
As far as headlights you can try any of these here http://www.flyncycle.com/Fairing_Headlights_s/1457.htm
or a something off ebay from another bike. Problem is, as far as I know 500 uses the same headlight as my bike, a single socket h4. So you can’t fit anything other than a single h4 light without cutting up and splicing the electrical.