If you can identify the pressure switch manufacturer it's worth a shot to contact them direct. With the conplete part number they might be able to provide guidance on obtaining a suitable replacement. On lots of stuff like this, minor design changes result in issuing updated part numbers which can make searching on line problematic. Most manufacturers maintain a obsolete/replaced by list of their items such as this. I find this quite often when needing to replace pressure switches in old well pumps. Finally... Buying parts thru Sears Direct can get very expensive. .. less expensive alternate sources abound for generic items (appliance and mower parts especially)!
