any chance you could build one of these for me, or let me know where that brass knob is found, I plan to steam punk my bike and that would look perfect on itA quick update- I had a problem with the shifter on one of my bikes slipping off. Gluing it in place would work but I came up with an idea that keeps the shift knob removable. I found one of these long bmx style bar end plugs in my tool box
the rest is easy. Just remove the shifter knob and drill a hole in the end of the shifter cap big enough for the bar end plug to slip in freely. Reinstall and add the plug...
and viola! The knob stays put!