There is a Chanel store in Chicago 935 North Michigan Avenue NEIMAN MARCUS 737 N. Michigan Avenue That's it. I would not trust eBay for such a high ticket item like that.
try ebay it's okay if u get a fake one, I have fake chanel earrings and a fake chanel purse and nobody knows I just tell them I went to sac's fifth avenue LOL!
You should write to Chanel for clearance to do so, you don't want to be sued if they find out. Since the jewelry looks exaclty like Chanel, it is trademark infringement. You will be sued.