Accolade link cable.....

I was wondering if anyone had the Accolade link cable for the genesis. It was supposed to work for games like Zero Tolerance. It was in the booklet for the game and said you could get one free my buying the game, you would just show proof of purchase and they would send you one for fee. I would like to get ahold of this cable if anyone has it or knows how to get it. Actually if anyone has any information regarding this cable it would be greatly appreciated !!