I think it'd be a waste of money. It's hard to go cheap on parts, unless it's an OEM at 50% off. You can't do it the other way around (off brand parts for half price).
I did it with my bar end mirrors, and my adjustable short levers. I hate both. My ASV and CRG lever's I have on my other bikes are so much nicer.
I think the headlight would work, but it probably won't last for long.