Same here with coat hanger wire.
Heat it enough to burn off the painted finish, then twist, hammer, squish to whatever shape you like. Grind or file to form a tapered tip to fit the touch hole.
Sewing needle? Maybe, as it is very smooth and not likley to become a reamer, but some are hard and might break in the touch hole, but most seem to be maleable.
Most coat hangers can be cold bent easily, including pounding a flat. The big end looks to me like a shepherd's staff, but totally closed so a leather thong or small chain won't slip out.
A more expensive alternative are brass rods, available in small diameters from many hobby stores or "Metal Express" or "Metal Supermarkets," or GOOGLE brass rods and see what you get in your area.
Same scheme: cold twist one end to a shape you like, then twist a few times, with one end being held in the vise to make the spirals, then grind/file/sand the other end to fit the touch hole.
More work, but coat hangers are usually available in your closet.