I have no clue, but just a
I have no clue, but just a thought; If you gave each 2, or 3 igniters, you’d get more of an average time…
Hmm, but there fit only one
Hmm, but there fit only one igniter into one rocket motor 
This happens within 0.12 s:
Guess you must make them yourself
They sell all the stuff you need to make the fuses etc at: http://www.cavemanrocketry.com/index.php