Hmm... I was browsing the local craigslist and happened upon another option - how about a dead Apple LCD monitor's controller?

If dad's power supply swap doesn't work, would the controller from one of Apple's 20" displays work? The monitor in question is *free* because the LCD itself is busted, but the controller and power boards inside are supposedly still good.

Would that still qualify as a "Holy Grail" mod? You needn't worry about getting pics / documentation - you NEVER try a project like this without writing what you're doing down!