I would recommend getting in touch with folks at the Crown Victoria association. It is a paid membership club, but they send out an annual list of current members. I used to know some folks in the club. Some of those guys hoard garages full of '55 Ford car parts. I would never have finished restoring my '55 Courier without knowing them. As a last resort, there used to be a guy named Bob Burgess who sold '55 parts but his prices were real high. Dont have his calling card anymore. He used to set up a booth at all the big swap meets.