gas ignitor for kVs of spark

[ren_zokuken01]

i want to create electric sparks that can travel through the air of a gap of about 0.5", so i need about 15kV. it only needs to last for about a second or two.

i've considered flyback transformers, car ignition systems and neon sign transformers, all 3 are a tad too expensive for the budget. i've looked into stun guns (as i can get one under $15), but trade of stun guns are prohibited in canada, where i live.

so now i've turned to gas/grill/stove ignitors. i've read they can only do a few kV, but i might be able to ramp the voltage a bit more.... the current i have to increase way, way more. maybe a bank of capacitors would do? i dunno...

help??