Mirrored Drive Door G4 Dual Mon. Question

I just picked up a Power Mac G4 Mirrored Drive Door, with 1.0 gHz Processor and 1 Gig of RAM. It also has a Radeon 9000 AGP video card with both DVI and ADC ports. I have two 19inch flat panels that I would like to use with this machine, and I have a DVI to VGA adapter, but it seems ADC to VGA adapters are either hard to come by OR when you do find one it is pretty pricey. My question is whether or not I can install another video card in one of the PCI slots for dual monitor support, or do I need to bite the bullet and snag a ADC to VGA adapter? Or, and this is altogether possible, am I missing a more obvious solution?

Thanks in advance for any and all suggestions.

OB

The ATI Radeon 9600 PRO for both Macs and PC comes with twin DVI ports and are on special as quoted in the link. Anything for ADC-DVI or VGA is expensive.

http://www.yourmacstore.com/shop/shopexd.asp?id=340

Alternatively, you can do what I did, and add a second inexpensive PCI Video card to run the second monitor off of.