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Need help with an Odd Electronic Motor Starter Switch on a Steam Boiler Feed Pump

Hi, has anyone encountered this "electronic" or "solid-state" motor starter switch?

*The third pic is one I found on the internet

It's for a Burks CT turbine feed pump, 115/208-230 single phase.

From online research, this switch appears be a substitute for a typical centrifugal motor starter winding switch.

The issue is the switch has crapped out but the rest of the pump+motor is fine. The manufacturer won't provide this switch as a replacement part and so we're left to buying a new motor.

I've spoken to multiple parties in the supply chain and everyone has told me it's an OEM part only and it's not offered elsewhere.

Wondering if any folks have encountered this and if there's a safe & sensible after-market solution?