A good tailor would know what to do. I bought a Victoria Beckham dress that had a zipper down the back and it came right to the bottom of the hem. Don't know how they did it but they hemmed the dress and you would never have known the zipper was any different. No clue how it was done but I was told it's done all the time.
thanks for the info! will bring to my seamstress to see what she can do!