The information is probably not readily available because most riders don't care. Most riders are more concerned about fit and function than exclusivity. Lets say I a going to buy a new car. Unless I am an enthusiast looking for something special I am not going to care how many of that model were made and which one I got. I am going to be looking at price, reliability, mileage, and does it fit my needs. Same with bikes. If it is good quality for the price and fits the rider's needs they don't care how many were made.