I don't see your point because most LDS don't stock a lot of the equipment that a PSD team would need with the exception of the basic cylinders, air fills, o-rings, etc. There are very few LDS that stock commercial diver equipment and try to cater to both industries, like the now defunct Aqua Tech in San Diego. AGA masks, large lift bags, diver umbilicles and that kind of stuff are expensive and if they don't sell, they take up a lot of shop space.