Well, you are getting me at a great time. I'm very much in the mood to build another hot rod.
I already have the name for it too:
EL VAMPIRO!
The Vampire!
Mike, I think you can try looking at both
www.coastairbrush.com
and www.dickblick.com
What you need is a long double 00 or tripple 000.
I know Mike Levallee has one in his striping set.