There are no online stores that carry Chanel, it can only be purchased through Chanel boutiques and Neiman Marcus, etc.
being that it has a 5th channel. It is a mono channel, there is no bridging it. To bridge a channel, it will have to have 2 channels.
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.