its probably worth having a copy, even if its a few versions old as you could atleast tell them you need in CSX. Plus it will help to verify that stuff didn't screwed up in translation. I primarily use mine to output films as i think it does a better job than corel, plus when I need to merge everything, Illustrator is far superior in that regards and the selecting same colors too. Oh back to the original question, a copy will probably do you some good or like Frog said and have them send an EPS or PDF.