Dave,
If you are interested in using a striker & flint, check out the big auction site. Search fire starter, or fire striker.
There are a lot of strikers being sold on there, some are actual roman legion fire strikers, (authentic,yes, they were in use then. guess it must be a reliable system!) some are reproductions, But they do work. You'll just have to find your own flint source. I use to use the leftovers from my flintlock days, till they became to small to hold. When they ran out I switched to ferro rods and bics.
My only suggestion is practice with whatever you choose till you can produce a hot enough flame in under 30 seconds consistantly to build your fire from. Better to wear out flints learning when your life doesn't depend on it, than to wear one out when your life does depend on it!
Hal