PC S/PDIF Input Card?

[la-li-lu-le-lo]

I was wondering if anyone knows of a PCI card of some type that will allow me to record digital PCM signals from a digital coaxial cable. My computer has a digital coaxial output, but no input. I also don't know what kind of software and/or drivers I would need to use such a device. Basically, I want to be able to store PCM signals in a totally uncompressed format; that is, it should be identical to the source.

Also, I'm looking for the cheapest device possible for this. I've seen a soundcard that has what I am looking for as well as several other things and it was way too expensive. I'm looking for a card with only a digital coaxial input and little or nothing else.