TOW has 9mm rod fittings, and hickory rods, and also PVC 9mm rods.
If you build your own rods, make sure you put cross pins thru the rod ends, and rods, or you will have a nasty awakening.
I may have to go with the TOW end even though they are not flared. I have a set of Treso ends but they are for 3/8" , I may try turning them down for a smooth transition to the 9mm rod.