eBay: 253170050795
They actually look like a step up from the Chinese ones I've picked up, nice that the poles are painted and the backs are finished.
They are just bare LED's with one dropping resistor, so you need a controller that provides outputs for three-aspect signals individually, they're designed to operate on 12VDC. Positive voltage on the common lead and ground on the light you want to light.
In order to use these, you'll need something like this controller, eBay: 150757223236
