I looked through the MA archives for info on 6V headlight options. It seems that 12V halogen bulbs will run pretty well on a 6V system because at higher rpms, well over 6V are generated. Also, it seems that the easiest bulb type to use is the MR16, as there are lots of different wattages, they come in 6 volt as well, and any hardware store has them for about 5 bucks.
So, after several trips to the autoparts stores, walmart and home depot, I found these chrome steel halogen lights at Wally World. Now, I don't like walmart. They sell crap. However, these lights actually seem pretty decent quality, and the price is right! $15 for a set of two. The chrome is nice, and the whole lamp is steel, the mounting bracket is solid, and can be tightened pretty tight. The light bulbs can be replaced in literally 30 seconds too. They are designed for cars so vibration shouldn't be too much of an issue. If it turns out to be, a rubber mount would be easy to fabricate.
So to mount them, I grabbed a bracket at the local hardware store:
Cut it up and drilled holes in the appropriate locations. I am using 2 of the handlebar mount holes in the tripple plate of my hobbit forks, and a third hole I drilled. The hardware that comes with the lights is 10mm, which is awsome!
I shortened the leads and hooked my ground and hot up by soldering and then using two layers of heat shrink tubing:
It is a small light; I was hoping to find something a little larger in diameter, but for 15 dollars for a set of 2, I think it looks pretty ok.
I haven't tested how bright it is yet; my bike is not quite ready to take outside and fire up. I turned the engine over with my cordless drill and the light lit up dimly, so I am pretty sure that with some engine speed it will be bright. Also, I am running a kit, so the 12v bulb will take the extra voltage. The only thing I have to do is get a lower wattage bulb; they come with a 50W but I think 25 or 35 would be more appropriate.