Stretched sprue, as Tommy suggested, would work, as would wire, as Jason suggested. For wire, you might also want to have a look in the arts & crafts stores like Michael's, AC Moore or HobbyLobby for beading wire. Some modelers use it for rigging biplanes in small scale. It's usually available in fine gauges.
Hope that helps, prosit!
Brad
Brad:
Good call on Hobby Lobby. They are bound to have something that can be used.
-Jason