yes handybikes.com has them in stock still, but not listed on their website.
you will need to call them at 614-299 0550 ask for BJ in parts.
they do not have the gas caps in stock which are a flip-type.
derringer cycles is cutting out the fliptop part and welding in screw type cap I believe.
so I will do the same.
petcock can be sourced from Yamaha QT50 model.