You could go into Control Panel>Device Manager and find each AMD related device then right click the first one and go to Properties. Go to the Details tab and scroll to Take note o fthe four characters which follow VEN for vendor and the four after DEV for device.
Go to http://www.pcidatabase.com, input the DEV reference into the appropriate box and hit Enter. A list will show up - match the device to the VEN reference and click. A longer list shows up but sadly, not in numeric order so use your browser's Find facility (usually under the Edit menu) to find the device. You'll then see links to the proper driver and the proper site - not a fake that only cons you. With luck you'll get an .exe file might it may also be a Zip...