Wow neat! I really like those!!! Another possibility that's pretty common is to go to a lumber/home store and purches chair legs. You can cut them down a little as necessary, drill them out, then add in a T nut to screw it onto the faucet.If you can get the threads out you can replace them with the right size (mine are 3/8).
Here are the tap handles I just made. They're almost done, just need to be polished.
I used a 3/8 coupler nut hammered into the end.
You could drill out your threads and either epoxy in a coupler nut, or get a hilti 3/8 concrete anchor and set it in there.