green NE-2 like bulbs?
I`ve seen green neons however they had a violet discharge and used a phosphor (white when off) to create a dim green glow. The ends of the tube were clear, but they only allowed the violet discharge to show, the green light was from the phosphor. They were not very exciting, certainly not compared to a 10mW DPSS green laser module. You could go in search of magic eye tubes. 

Okay, they still seem to be available, at least from some sources. These ones don`t look quite as the Japanese ones I remember (but it was a very long time ago).