there are a lot of generic ac-dc adapters available out there, some with variable voltage outputs and/or multiple/interchangeable dc plug.
correct me if im wrong, pero lam ko po, rating-wise, 2 things your should be aware of are that the dc voltage (V) output should be
exact with your equipment. while the current rating (A, mA, etc) of the adapter should be
at least equal to the requirement of the equipment.