Actually they're not rods, it's kevlar string. Will not stretch, and pretty strong. It will fray from the vibration though, so I put a drop of CA on the kevlar where it loops through the eyelets.

Everything needed to do what I did comes in Sullivan's flying wire kit. I don't know the part number. The kit was 16 bucks at my LHS. It also includes steel wire, but I didn't feel like putting a potential source of interference on the tail.