I tried scratchbuilding one, since I couldn't find the "found" items that the original was made from.
I also bought a set of 3 strobe lights to go in the background of a set I will eventually build for my bots, which are on top of the movie sign in the picture.
The movie sign lights, as I was told were actually just clear spray paint caps that were painted with the colors of the bots (however there are a few variations depending on which season you're going with).
I haven't had the chance to get any clear caps without those pesky finger dents that Krylon has, so my sign is still incomplete.
When I do, I'll add some LEDs in there as well.
Here's a pic with the screencaps on the left: