I found such a card in an old machine, but there was no hard drive for me to get the drivers from. It says:

copyright 1996 CSI

P/N 00-9611-PCIS REV. 4.702

FCCID H39PCIS

and the sticker on the firmware ROM says:

LQS-PCI REV 1.50

Copyright CSI 1997

Anybody else have one of these? It looks like a decent card, and more hackable than my Keyspan.