I'd use thin piano wire, say .020 or .032. Many hobby shops sell music/piano wire, since the RC and CL guys use a lot of it. If you can't find piano wire, then the .020 brass from K&S (also found at most hobby shops) would work. It won't break, but will bend, whereas it is very hard to bend the piano wire. Drill a tiny hole with a tiny drill and pinvise in the existing base, and a daub of CA will hold it.