I managed to find AppliancePartsPros.com, found the part, input my refrigerator model number to make sure the part was compatible, confirmed that it was, ordered it online.
Two days later I received the part, and tried to replace the part. There was a flange which seem too long to fit into the slot, and I didn't want to break the piece again by forcing it. I recalled there was a video on how to replace the part at AppliancePartsPros.com, so I went back online, located the video, learned that the flange wrapped around, rather than fit inside, the slot.
When I went back to replacing the "module shelf insert" it went very smoothly.
Problem solved all with 48 hours.
Terrific.