Wanted: Modern Looking for period-correct light/siren controller & switch box for a 1985 Ford Econoline E-350 Ambulance

Hi everyone,
I am restoring a vintage 1985 Ford Econoline E-350 Heavy Duty Ambulance here in Poland. Unfortunately, the previous owner completely removed the main control panel / switch box that operates the emergency lights and siren tones.
The good news is that the original wiring harness and plugs inside the cab/electrical compartment are still intact and untouched.
I am looking to buy a period-correct, vintage controller (like Federal Signal PA300, Whelen 295 series, Code 3, or Southern VP) that would match a 1985 ambulance build.
Since I want to buy the correct unit that will plug right back into my existing harness, could anyone help me identify the original manufacturer based on the plugs? I will post the photos of the factory plugs in the comments below.
If you have a working controller, switch box, or siren amplifier from that era for sale, or if you know where I could find one, please let me know! I am willing to pay for international shipping to Poland.
Thanks in advance for any help or leads! Czarek



 

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