I would say something along the lines of the exotac would be the most survivable. the blast match and the mini version are both a bit bulky for pocket carry, unless you have deep pockets. My thought would be a peanut lighter. the good ones hold fuel for a long time, and even if empty will throw at least some spark.
That said you can get small ferro rods off the bay for cheap, and you could super glue some string on for a loop. If your prybar can take an edge (90 degrees) then you have a striker. If it doesn't work out, you are only out a couple bucks.