Replaced the inlet sump with the replacement part from Appliance Parts Pro that came with less than 1 day delivery (outstanding!).
Just had to loosen the 3 clamps that tightened the connections of the sump to the sump pump, thermal sensor and water inlet line. Pulling the sump out of the bottom of the machine needed a bit stronger pull, but did work well. The new part did fit perfectly, only when attaching the large clamp one has to make sure the rubber edge tightens properly an all sides with the dish washer bottom.