You are looking for either a ghost, or the Holy Grail of smoothbore shooting. :surrender: :hmm: :shocked2: :thumbsup:
I don't think there is anything like an inexpensive DB flintlock shotgun made anywhere. I don't think it can be done. The labor and technical problems involved in making such a gun, and then regulating the barrels so they pattern to the same POA is very expensive work to do.
With modern CNC equipment, and computer programs that make every part, its possible to produce such a gun- or at least the parts-- at a much lower cost than ever seen before. However, but the devil is in the putting the parts together, and then regulating those barrels. Robotics can put the parts together, of course, at a cheap cost, but the barrel harmonics of every barrel is individual to that barrel. Even using laser bore sighters to adjust the two barrel to a given POA is only half the battle. Its when each barrel is loaded, and fired that the harmonics come into play. The investment in the high tech equipment would require a substantial retail price, which would take it out of the " inexpensive " range of guns. The higher the cost, the smaller the available market. MLers are not exactly at the top of the market in sales these days. ( In fact, hunting guns in general are not selling well, while Defensive firearms can't be kept in stock, as a result of the current political climate.)
i am sorry I can't raise your hopes on this issue, but you would be standing at the back of a very long line of members here if a DB flintlock shotgun that was " inexpensive" came on the market. :hatsoff: