US Gear Tow Brake Issues

I have a US Gear Unified Tow brake system that has a bad control module and I understand that they are no longer producing this unit or parts for it. I found a unit out of Florida on e-bay and bought it but it also has a bad module. I love this system and have been using it on various toads for at least 20 years. My question is, does anyone have one just laying around that I could buy , or does anyone know the manufacturer of the circuit board.  I'm desperate to find a working controller.

Thanks so much!