Hello!
I can do vinyl trims on your helmet, I do fairings and helmet vinyl wrap on the side, here are some samples: www.jwrap.ca
As for Air Brushing, I know of a lady locally that does amazing work! it might cost a bit more but her results are amazing! Air brush would cost a bit more than vinyl, but the details can be more complex. Here is her website: http://www.blackwidowairbrushing.com/
Hope this helps!
I am amazed that nobody has yet named Amanda.
Amanda did my helmet years ago. Great work.