I made such a kit years ago. Steel striker, a couple of good flints and a supply of char cloth. It fits inside an Altoids tin, which in turn, fits in a leather pouch that attaches to my belt or I keep in in my pack. A piece of buckskin separates the tools form the cloth. It's possible to use the Altoids tin to create more char if necessary. I've used the Altoids tin to make char made from punky wood and tinder fungus which works as well as cloth. I find the system more dependable than a butane lighter which won't light worth a hoot in cold weather or at high altitude.