Ubuntu has never had an 8.4 or 9.4. They are 8.04 (April, 4th month, 2008) and 9.04 (April, 4th month, 2009). 12 months of the year in Ubuntu speak go 01, 02, 03, 04, etc, 09, 10, etc.
Originally Posted by snowpine
That detail aside, in order to get any meaningful help, you'll need to tell us your network "chipset" so we can recommend the correct driver.
lspci | grep Ethernet
That aside the repositories have moved, and for good reason, so you would need to make other changes in order to get the firmware from them. Better off just using a currently supported version.