Okay, here's a possible work-around to the VGA cable unavailability issue. Yes, it would be a bit clunky, but pretty sure it would work. For $30, I'm taking the chance, and have ordered the pair. Available from Amazon.
UPDATE - 9/28/13 - This works very well! Much better picture clarity than I had thought might be possible - nearly as good as what native VGA should be. And because the converter is power via USB from the laptop, it's still a truly portable solution, good for as long as the batteries in the projector and the laptop last.