The King of Spain used a 14 so his friends could not borrow shells from him. I always wondered if he was cheap or if they were deadbeats. That said, look at Spanish shell makers also. Also Italy may be another source. Another option would be to have a set of 14/16 or 14/20 adapters made like the 10/12 adapters. You still have to watch pressures as I doubt the 14 was made to stand up to today's pressures.