Do westerns count? There is a recurring minor character in Louis L'Amour's Sackett books, kind of a travelling blacksmith called The Tinker. He goes from town to town in a wagon with a small forge in the back, doing odd repairs, and he makes the best knives in the West. Most of the Sacketts have a Tinker-made knife in their belts.
I can't remember if the Tinker actually gets involved in any of the cowboy action, or even shows up in person. I've only read some of the Sackett books, and a lot of those I read 20 or more years ago.