If you are not concerned w/factory correct...any of the major suppliers will work, IE; Rick's, Classic Ind. etc. The problem with these products is the result is too uniform.
The only way you can get a factory correct finish is to apply it by hand and in three stages. Primer, base and spatter. These pics are from my car. The base and the spatter appear to be applied with the gun trigger barely depressed, hence the term spatter.
Hope this helps.