This is a model I made for my Suzuki VX800 motorcycle.
The original has to tabs that hold it onto the petcock itself with a screw to secure it in place. The tabs broke off, and an OEM replacement, if you can find one, is to expensive.
I designed this to be easier to print in fdm, so you print the tabs separate, and simply hold it into the handle with a drop of superglue.
The author hasn't provided the model origin yet.