No BigM-Perazzi, T & S does not make a deflector. A deflector is what he is wanting not a shell catcher that you discribed.
You will probably have to weld on a lug on the inside of the barrel, like Remington did for their Trap barrels. Winchester made one for their Super-X 1 that was made of spring steel and snapped onto the front of the receiver and was held in place by the forend wood.
I have had a pin welded to the barrel extension on Beretta's for years. It is placed almost exactly as the pin on 1100/11-87 barrels. Paul Homer did all of mine but Paul is no longer with us. They always worked.
I had mine done by a gentleman at the Silver Dollar in Florida. Took him about an hour and iy only cost me $25.00 He drilled a small hole and palced a pin and it deflects the hulls almost straight down.