I can find info on this just not where to purchase:
Seems, it is not available.http://www.albatron.com.tw/English/product/VGA/pro_detail.asp?rlink=Specification&no=249
You can get some 8400 or 9400 PCI cards. A PCI 8600GT is a waste of money, since it's severely crippled by the PCI bus.
I have to agree, this card wouldn't make an old PC play current games. If your intention was to play games with it, you might want to save up for a system with a PCIx16 slot.
I would check NewEgg.com for a card simular to the one you want and alot cheaper too.