I did an imitation A12 hood, I used SEM hot rod black, and on the last couple coats I played with very low low air pressure and cross coating to achieve the texture.

I posted a thread about it in the projects area awhile back.

I'm happy with it, it duplicates the look of the nicest show cars I've seen.
And I believe the originals had quite a bit of variation to them as well.

Without the air pressure and texture games and just applied as you would any single stage, I thought it was a dead ringer for the tail panel finish on my 68 charger.
I covered that and posted at least one picture before adding texture in the same thread.

National Tool Warehouse had the best price.

Or there is always the Gibson/Badalson route $$$$$.