Take Denny's advice and get the PPG 27467. To the best of my knowledge the Rustolium color is only available in an aerosol, and the stuff they sell at Classic Parts (Ultra 7000) is like $60 a quart plus you have to buy a gallon of "stabilizer" for $70 which they don't sell.
The PPG color is available in acrylic enamel and IMO your most cost effective product, not to mention a direct reformulation of the original color.
