How can a build a display of LED emergency dash lights?

How can a build a display of LED lights? I sell emergency vehicle lights. I would like to be able select one model at a time (similar to car stereo displays commonly found in retail stores). The display would be a wall with a push button switch that would power 12vdc cigarette lighter outlet. I only want one... show more How can a build a display of LED lights?
I sell emergency vehicle lights. I would like to be able select one model at a time (similar to car stereo displays commonly found in retail stores). The display would be a wall with a push button switch that would power 12vdc cigarette lighter outlet. I only want one unit to be powered at a time. Could I do this with momentary switches and a type of relay circuit?
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