Do a Google search for ultraviolet light (handheld or battery powered). You'll see a variety of models to choose from, starting at just a few bucks. Personally, I like the 9-light LED version, because it is more powerful and concentrates the beam, but it costs more (several models available on Amazon).

Also, I think C.T. Coins sells at least 1 model, along with any other chip supplies you may need.