I was just searching for the same driver and found this site through Google. I know this is an old post but since there was no solution listed I thought I'd post what I found. Go to the website for Encore Electronics, Inc. (just google it) and look for the driver on their download page.
It is the driver for the ENL832-TX-RE - this forum won't let me post the url till I post 7 messages but thought I could still help out. I was looking for a long time before I found the correct one.
This worked for me as the ENH832-TX+++ was what the sticker said on the pci card. It has a Realtek 8139 chipset and the driver listed above worked fine. I don't know why Encore makes it so difficult to find the right one, but it is there on their site. Hope this helps someone else!
