Need Air Conditioner Help

[Veek]

Unfortunately, I find myself in a but of a fix. I have a CAV GT40 replica with mostly South African parts. It seems that my Air Conditioning Control Box has gone on the Fritz and I need to replace it. I was wondering if it looked at all familiar to anyone and if it is something you may give me a lead I may pursue to to source a replacement. The U.S.A. CAV rep indicated that the part in question is no longer made and I will need so install a substitute but was unaware of what that might be. I've also contacted the factory and they no longer stock the item.
Voltage goes in into the unit but none is distributed to the A/C pressure switch, compressor or condenser fan. The part number on it is 05-016-004-01 (as seen in the pictures I have attached). I was hoping that if I couldn't find a part, could you possibly advise me of anyone that may know any appropropriate substitutions or possibly direct my inquiry.

Thanks so much,
Veek