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Vent-Aire Control Circuit ECS44

I have an Older Vent-Aire Heat Recovery Ventilator with a bad circuit board. Does anyone know where I can find one (new or used)? I believe the company is out of business but was based in Colorado Springs. Phone number is not in service.
Second Question: Can this board be repaired? I hate to think that I have to replace the Air Handler for just a circuit board. Cost to replace would be thousands!