Their are a few shop around that still make the old cast cannons , you will have to do a search to find one. There used to be a shop in S . E . Missouri around Puxico that made cannon like you are looking for , he made the 1 pounder up to the 12 and also made the Motar and they were great quality . But I have not been there for 10 or more years and cannot remember the name . But I will tell you that they are not cheap !