First of all, to help anyone that cares; The true name of the "lights" shown in the picture are "Classification Lights" or for short "Class Lights".
In North America they indicate the "Class" of train the locomotive is pulling. Normally they could be; WHITE, if it is an extra train, not on the timetable, or GREEN, if there is a second section of the timetabled train following. RED is NOT normally shown by these lights, unless a locomotive is running in reverse, at the tail end of its train.
The rule governing the use of these Class Lights is: "Flags by day, and Lights by night". As modellers, we do most of our running/operating trains, in a daylight situation, so should really be using FLAGS, not lights, in most situations, although few seem to care, and have sort of an attitude that "More Bells, whistles, and lights the better" !!
Others have suggested a few suppliers of model Lanterns, and lights...mostly located in the US of A, but if anyone is looking for replacement parts for Aristocraft locomotives, try: GLX Scale Models, in Canada
www.glxscalemodels.com
I must warn modellers of North American Railways, that the use of Class Lights/flags in these modern day has drastically changed, from the days of steam locomotives, and early era Diesel electric power.
BTW...last but not forgotten...in the old days of Cabooses; the lanterns/lights on the end cars of trains were called "Marker Lights, or Markers". The saying was..."Markers bring up the rear" (Of the train).
I hope this note is of some help to those interested.