With a quick search I found a few images of two-tone 57's. I'm just not sure what your trim looks like. You may have seen these already, but just in case...
Brochure or ad for the 300
http://www.oldcarbrochures.com/stati...rochure-02.jpg
http://www.regresspress.com/catalog-..._300_id920.jpg
And a feature car on another website (says it's a fairlane 500 though.)
http://www.cruisenewsonline.com/1957...00Feature.html