Brooks-USA - bought a mortar barrel. It arrived very quickly and quality wsa excellent.
South Bend Replicas - ordered a book, it arrived in a week.
Dixie Gun Works - I'be been dealing with them for years.... never an issue of any kind.
Hern Iron Works - Coehorn Mortar barrel. Arrived quickly (about a week after order paperwork was recieved by them). While I do not have an X-Ray machine, the quality that is externally viable appears to be excellent.
Rope Magic (cotton rope) good communications - they could only supply part of my order, asked im,mediatley if they could substitute, and provided way more of the substitute than the original item.
Powder, Inc - quick responses to questions, fast shipment.