I just got my G5 but can't figure out how to hook both my CRTs to it.

The video card has one ADC port and one DVI port. I have a DVI -> VGA adapter for one monitor, but I can't find anything like a ADC -> VGA adapter.

Any ideas where I can get one? Or does it not even exist (ie if I want dual monitors, do I need to get Apples studio displays?)