we do have at least one good plastic gear laying around. the desired stuff is brass because it won't crack, but will wear easier than the rest of the regulatorHow many people are still trying to get these gears? I know a gear genius with 100 year old equipment and is one of only a handful of gear guys left in the southeast. He makes gears for obsolete industrial equipment, and he is old school....no cell phone, no internet, no blueprints. I bet he could make up a batch of these. What is the preferred metal? Anyone have a sample of the gears needed? Are there different gears used over the years? What would folks be willing to pay for these? Let me know and I will see what I can do.