Powder coated exhaust manifolds

Could someone tell me the original color of the exhaust manifolds on the 1965 273 in the Barracudas? Mine are currently colored 70 year old rust and I would like to powder coat them to something closeer to the original color.

Thanks all.
By "powder coating" I meant generic. I know the owner of a company that does coatings for everything from house railings to dragster headers. I am sure he will direct me to the correct product. I am just looking for the correct color.