Lucky for you - the ATI download sites has ATI Mobility 5000 Series drivers.AMD Radeon Graphics for Notebooks--> Use Find A Driver
That won't help. AMD doesn't provide drivers for notebooks to consumers, they provide reference drivers to the OEM who made the notebook. They only provide a few tools and other junk to consumers.
Notebook drivers can be obtained from the manufacturer of your laptop. It is possible to install tweaked drivers from third party sources but I do not recommend this as it will often break features specific to your laptop