Yes .... well maybe.
I couldn't be certain as to if it would actually work for your system or not.
However, Magma makes CardBus PCI expansion units.
They ain't cheap though (unless you can luck out on eBay).
Needless to say .... I'm like H2H .... very happy with my 828mkII.
You don't want to be hooking up extra junk in the middle of your audio gear path. The more things in between the computer and the inputs, the more that can (and will) go wrong. Firewire is the way to go for laptop recording, no doubt.
My Laptop is a stock Toshiba Satellite P25-S520. I'm running Sonar3 Producer on it. Plugged and went. No bs setup issues at all. I was recording in less than 5 minutes.
I'm running a stock HP Pentium4 2.8GHz notebook with 512mb ram behind my 828mkII and I'm perfectly happy with it as well. I've used Cubase, Sonar3 and Sonar4, SoundForge, Audacity, Adobe Audition, all with no problems.