were they an OEM Ford supplier? or did they make aftermarket replacements? some company is selling some taillights as NOS but he lists Do-Ray as the manufacturer, anyone use Do Ray parts before on an older Ford? (didn't find any info online using google)
Found a guy on eBay selling a scanned copy of a Do-Ray catalog from 1965. It says that they made replacement lenses for cars going back to the 1940's. I am guessing that they are out of business or were bought out.