Yes you can get a cheap $70 PCI->PCMCIA adapter that mounts in a PCI slot and has a PCMCIA card slot that sticks out the back of the computer.
That, or you can get the Panasonic 5-slot reader, but that runs something like $2000-$2500 and connects through USB. The PCI->PCMCIA adapter would be much faster and a lot less expensive; the only thing is that you have to fit cards into the back of your desktop.