why not get a sustainiac?? from what ive heard, its easier to install, comes in white or black, and humbucker or singecoil sizes.
Plus, (just my opinion) it looks cooler.
you can order it from their site (www.sustainiac.com)
Not sure where my reply went, I posted one this morning.
Anyway, only way to get a white Sustainer, if you aren't Vai, was to buy a Fernandes guitar that came with one. They never sold them separately, only the black one.