i bet you can run the drive pulley off of a turbine that is powered by the gas pressure, there are no opposing magnetic fields so this thing should spin as free as the bearings will let it. you will just have to kick-start it off of a small motor.
Also it wont be the amps doing the work, this will restrict amps, you put 40 watts into the EPG, at 12 volts, that leaves 3.3 amps, then you pull the voltage up to what ever you want, 20,000 volts, that'll leave you with 0.002 amps going to the cell, this accomplishes exactly what the VIC does, except it doesn't need electrical resonance, and you don't need a diode or ss wire. you can wrap the little bobbins with thin copper wire, say 0.005", and do 1000 turns per bobbin, 36 bobbins per layer, at least 4 layers, that could be 144,000 turns just from the bobbins, not to mention the two secondaries. this thing can definitely produce high voltage and restrict amps. and send pulses to the cell, what more do you need?
sure the vic coil is probably cheaper and easier to make, once you know exactly how to build it, but this thing would work no matter how you built it as long as you aimed for high voltage.