I was given a church candelabra without a foot. I received a note saying "maybe you can figure out how to save this candelabra and make it stand". So I looked at it for about a month and then one day I knew what to do. I wanted something rough so I casted the foot in concrete. I first added a screw (there was a hole) and welded a metal cross to the screw to make it more stable inside the concrete.
It turned out just fine. And as I love burning candles - this is just perfect in my home!