My main gun passion is traditional muzzle loaders. As a result I have learned to make much of my own equipment. Doing so is fun, gives me what I want and saves a bunch of money.
My first thought reading the original post was to make yer own rod. I would use brazing rod and thread/tap the ends for jags and a handle. Cheap, easy on the bore, sturdy and you did it yerself. What could be better?