Uhg! I just spent 20 fruitless minutes loooooking for something, but there's nothing where I'm looking. If you have a good enough digital camera, you could post a pic of the voltage controller, and I could try to find the mod for that controller.
You might also try posting in the voltage mod thread
, although I'm not sure how active it is right now.
Sorry I couldn't come up with anything.
BTW, I'm not sure which chip is the voltage controller, but here's my guess (second pic).
EDIT: I can't tell from the pictures I found, but if there's a small metal casing by the chip (see first pic), then look for slightly longer and thinner chip with about half as many pins.