Making exact copies would take metalworking equipment that I don't own. Here are some photos that give an idea how they work.
http://antiqueradio.org/art/RCA_TM-10_Convergence01.jpg
http://antiqueradio.org/art/RCA_TM-10_Convergence02.jpg
http://antiqueradio.org/art/RCA_TM-10_Convergence04.jpg
http://antiqueradio.org/art/RCA_TM-10_Convergence03.jpg
http://antiqueradio.org/art/RCA_TM-10_Convergence05.jpg
The wands have a spherical part that allows movement within the mount, which is a simple clamp with beveled holes. At the ends, little swiveling clamps hold the cylindrical magnets.
If somebody held a gun to my head, I might try to fab something out of brass stock (assuming it wouldn't matter if the wands were non-ferrous). The spherical part could be a brass bead with a hole drilled through the center, soldered in place. The magnet clips on the end could be as simple as a piece of wire soldered to the wand and wrapped around the magnet. The magnets are practically weightless.
Eventually, I'll need to figure out how to replace the two missing magnets. Perhaps I'll try cutting bits from a frig magnet.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html