The drivers would be at AMD.com, if they still support that card. That things like 13-14yrs old.
This is the cheapest I can find new, it should work.http://www.newegg.com/Product/Product.aspx?Item=N82E16814139165
I don't think I'd sink any money into that dinasaur though. Maybe check craigslist for a AGP card. I used to have boxes of them but I threw them away years ago.