I don't have a headlight but you can get them on Ebay (same as Arctic Cat) from time to time. They normally go for $50-60.
The engine I have needs to be gone through, so I'm not sure what all it needs yet. I have vacation time coming up next week, so I should be able to get a good look at it then. It has a lighting coil and the correct throttle linkages etc. It does have compression, so it shouldn't be too hard to get running. I'll let you know when I get to it