Via does its own USB 2 pci card . See here
http://www.via.com.tw/en/Communications/USB2.jsp
It is not clear what via chipset this is using but its quite possible that the card you have is the same as this via products
The drivers for this device for windows english edition can be found at
ftp://downloads.viaarena.com/drivers...2_V258p3-L.zip
I am downloading them now to see if they have the file you are looking for but they are 9meg ish so it will take me a while.
In the mean time I am posting this info. If they do not have the file you need then sorry. If they do make mine a pint of IPA.