black head lights
 

I have seen a few cars with the inside of the head lights painted black and even one or two with carbon fiber. I was wondering are this custom head lights people are making them selfs or is there a company making them?

there are two ways basically. either spray them by yourself, or ask other if you think you might screw up your precious headlights while doing it by your own hand then leave the work to proffesional ppl out there to spray them for but you will have to pay them some amount of $$ or ask one of your skilled friend to do it for you. talking of praying the headlight, go and search DIY section :)

noone is making the headlights yet. People are either doing themselves or there are companies on the forum like MR works and 180 customs who will mod you lights if you give them to them.

This is a very risky modification if you have never done something like this before. I recommend using MRWorks. They have done numerous 370Zs and the price is not that bad considering the task and quality.