What if you add your text back on white, but outside of your PDF bounds? Some software (I know Adobe Illustrator has it for sure) allow you to design it so, that the visible part would be one, and everything outside the bounds would be in the document, but isn’t visible neither to a person, nor to the printer. The software would see it. I bet it should work, and I think I’ll try that when I’m at the job hunt myself.