Generally any larger parts stores like napa and mr automotive carry paint and can mix to match your factory paint code.
The question being is do you have the equipment to do this your self? Are you planning on doing a single stage or a two stage (base/clear) . If you don't allready have the equipment to paint it your self you may be better off just going to a local body shop and paying them to do it, they should be able to give you a qaulity job for a very reasonable price considering the liimited size of the item. Just my ten cents. Seth