I've come across a source for odds and ends like exhaust valves, O-rings, low pressure seats, diaphragms, and such. I know there are those of you who rebuild your own regs, especially older ones. If you need something, PM me and I'll see what I can do. I really like being a DIY guy, so if I can help someone else I'd be glad to. Be sure to be specific in what you ask for. If you need an exhaust valve, I need to know what diameter, if you need O-rings, I need official sizes, etc.