People can do what I have been doing for many years. Go to swap meets and look through the catalogs offered by various vendors. If you can find them still, you want the parts catalogs from the various companies (Gabriel, Monroe, Auto-Lite, United Motor Service, Borg & Beck, etc, depending on the part or assembly for shocks, electrical, clutches, etc) dated between 1954 and 1961 or later. Be advised that many of the muffler books may list Kaiser, Frazer and Henry J, the parts are a "universal" replacement with a glass-pack muffler.