Floquil Zinc Chromate Primerwhat are the alternatives?

I am currently putting together an ESB Fett sidearm and been unsure of the proper colors. My client asked for me to match another's paint scheme and just really discovered the name of the paint used. However, the paint is discontinued. To add, it was an airbrush paint, and I'd need an aerosol

ZINC CHROMATE PRIMER, SKILCRAFT

So-Sure® - TT-P-1757 Zinc Chromate Alkyd Base Primer, Yellow

A self-etching primer that is chromate-free and chemically bonds with aluminum and steel to form a corrosion resistant base coat. Can be topcoated with two component epoxies or left as is. Excellent resistance to seacoast exposure. Meets performance standards outlined in Federal Specification TT-P-1757A. Exceeds 800 hours of 5% salt spray fog test (ASTM #B117). Do not apply excessively as it will greatly increase the drying time.

Seymour 16-897 Primer Yellow Zinc Phosphate

Floquil 110601 Zinc Chromate Primer 1-oz

TT-P-1757 (TT-P-1757B) – Pacific Resins & Coatings

WLLW's Guide to Mineral Paints

DiffQuick, Diff-Quik, DiffQuik, Diff-Quick, Quick Dip, Diff Quick

Falco Zinc Chromate Primer - Gulf Paints

A two-component, non-sanding primer with excellent corrosion resistance and adhesion for direct-to-metal applications. It is ideal for sandthrough

Cromax 2580CR Chromate Epoxy Primer Gallon

Floquil Zinc Chromate Primerwhat are the alternatives?