Skeptical, but I take your word for that. Anyhow, I'm sorry, but I don't think I can help you immediately. You're asking for a big ripple voltage across a large capacitance at a high frequency and only want a little current to flow through it. I was thinking this could be done by resonating it with a parallel coil, but the practical amount of Q turns out to be so low that the generator would be loaded too much, even at resonance, to provide the voltage you want. Capacitors do not use any real power, so the output power of your generator is not an issue, theoretically. I am sitting on this problem for now.