The ice maker had 7 years of heavy usage, so I ordered a complete replacement unit from AppliancePartsPros. I ordered it on line Tuesday with just Standard shipping, $6.95, and received it on Thursday! I watched their very helpful instructional video on replacing it, and was able to replace it in minutes, as it showed where the hidden locking tabs were located. I'm sure it would have taken me a while to find them on my own!
I am a very satisfied customer!