Pete,
I used a lathe and cut them out of aluminum rod. When I posted the picture, I mentioned that it could be made of various diameters of the telescoping aluminum tubing found in RC shops. I have used the Hysol 9430 from Aircraft Spruce and love the stuff. I would use that to assemble all the parts, but I think any epoxy would do as all the ferrule does is capture the cable sheath to keep it centered The choke compressive forces would be between the end of the curved tube and the cable sheath. Then again, for the sake of the fraternity, if you were to send me a PM with accurate dimensions of the ODs of the bent tube and the cable sheath, I'd be happy to make up a couple for you and put them in the mail. They would be glued in place.