Originally Posted by DanOSB  to incorporate a auto lighting system (instead of using a striker to start the flame |
A 12 volt automotive ignition coil will work.
The system pictured has the coil & 12 V supply in the upper control panel with a high tension (spark plug) wire running to an insulated brass rod electrode gap at the torch tip.
A momentary signal to a relay (or push button) to power the 12 V supply will then provide the necessary spark for torch ignition.