OK guys, I have a challenge for you. I have a vintage Healthways Scubair second stage in super condition. Except the diaphragm. It`s lost a LOT of it`s flexibility in 40-50 years. I`m looking for a replacement. It doesn`t have to be exact but pretty much anything would be better than the one it came with. It needs to be 3 3/16 inch (8.1 cm) in diameter with the edge .1 inch (2.8mm) thick. I have included some pictures of the regulator with the diaphragm. Hopefully I can find something close. Hell, it even works with an old Dacor diaphragm I had. It`s a very cool old reg even if it`s almost like breathing through a straw. I just would like it to work as good as possible. Any help would be greatly appreciated.