He is authorized, and yes his new bumpers resemble a stock bumper. I think he had to modify the extension also.
In fact, I am having him make a bumper for a Jacoby I just purchased. Reason I am having him make one is while Jacoby has a nice quick release one, I dont want to buy all new extensions as I have 3 different lengths. He has to make one in the old style to match my existing extensions.
I actually had one of my cues at Schon with his bumper on it.
I know the old style, I had to send him measurements of the butt cap area.
With his old style, the bumper screws into the weight bolt in the same manner the stock one did.