ireckon, both our walmarts and Walgreen's here had both the flints and wicks, although lately I haven't seen them at walmart but still are at walgreens. Worst case you can get them from zippo or smokey mountain knife works. I would recommend your primary peanut lighter you are going to carry with you to change out the flint and wick with either zippo or rosen and you will have a greater quality of components and tweaking the length of a good quality zippo wick can make a pretty decent size flame.

Dave, glad to help. I have had very good luck with peanut lighters once I put better parts in them. I continue to randomly test them to see if they still light up years latter. Always carry one 24/7 and a fov of fuel for longer run time.
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Failure is not an option!
USMC Jungle Environmental Survival Training PI 1985