Replacing the RDU (Rear Differential Unit) - PRogramming help

[kasdoon]

2018 Ford Edge SEL AWD 3.5l  (non-Turbo)  110k miles

I have ti replace my Read Differential (RDU), I am trying to find a replacement (Ford does not have them) from e-bay or other sources.   However there are so many China ones and ones that list every part number as interchangeable it is a freaking nightmare.

I have found a couple where the numbers are close but not the same

My Numbers are : CV6W 4B025  DF / S-162-A from the tags. (see images)  There is also an etched number  on the coupler CV6W 4600 BA

Most that I find, the second numbers are S-15n or S-164-A

I have read that if the S- number is not the same the vehicle needs to be reprogrammed?  Is that true, or are there ones that are direct interchanges without programming to mine, and what are they?

I see that Forscan could be used, however, you can no longer get the Windows or Android version, so is there an alternative?

Thanks in advance an I really appreciate the assists!