The bar is a North American Signal AB1, the housing and lenses of the beacons are either Federal Signal 14s or a pair from a TwinBeaconRay but with the rotators from Mars SW2s, the speaker has no base/spacer between the housing and the bar.
The housing is mounted directly to the bar with some type of clamp.
The cone is from any TS100 type of speaker with short cone.
Maybe the projector is from the same speaker as the cone, who knows.
It can not be to difficult to get a TwinBeaconRay and a CP100 speaker instead of this hack job.
Michael