#4869499
Some people I know that were searching for this light found that the closest thing they could compare it to was a DJ beacon. If you google it you usually find blue and red ones and some are pretty close in size. May even be able to use one and convert it.

Otherwise custom making one may be the only other route.
#4869549
Another detail that suggests that the beacon casing is either custom or non-pro (such as a DJ light) is that during some of the location shooting, there was a strip of blue tape around the seam between the silver casing and yellow lens when it rained; obviously they were worried about the electronics getting wet and had to seal it off. If it were a Whelen or other such product, it would have definitely been weather-sealed.

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